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Dell Optiplex 880 Diagnostic Leds 1 2 3 on Continuously No Display

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Troubleshooting

Dell™ OptiPlex™ 760 Service Manual

  Tools

  Dell Diagnostics

  Solving Problems

  Dell Technical Update Service


WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.
WARNING: Always unplug your computer from the electrical outlet before opening the cover.

Tools

Power Lights

The power button light located on the front of the computer illuminates and blinks or remains solid to indicate different states:

  • If the power light is green and the computer is not responding, see Diagnostic Lights.
  • If the power light is blinking green, the computer is in standby mode. Press a key on the keyboard, move the mouse, or press the power button to resume normal operation.
  • If the power light is off, the computer is either turned off or is not receiving power.
    • Reseat the power cable into both the power connector on the back of the computer and the electrical outlet.
    • If the computer is plugged into a power strip, ensure that the power strip is plugged into an electrical outlet and that the power strip is turned on.
    • Bypass power protection devices, power strips, and power extension cables to verify that the computer turns on properly.
    • Ensure that the electrical outlet is working by testing it with another device, such as a lamp.
    • Ensure that the main power cable and front panel cable are securely connected to the system board. See the following:
      • Mini Tower — System Board Components
      • Desktop — System Board Components
      • Small Form Factor — System Board Components
      • Ultra Small Form Factor — System Board Components
  • If the power light is blinking amber, the computer is receiving electrical power, but an internal power problem may exist.
    • Ensure that the voltage selection switch is set to match the AC power at your location, if applicable.
    • Ensure that the processor power cable is securely connected to the system board. See the following:
      • Mini Tower — System Board Components
      • Desktop — System Board Components
      • Small Form Factor — System Board Components
      • Ultra Small Form Factor — System Board Components
  • If the power light is steady amber, a device may be malfunctioning or incorrectly installed.
    • Remove and then reinstall the memory modules (see Memory).
    • Remove and then reinstall any cards. See the following:
      • Mini Tower — Cards
      • Desktop — Cards
      • Small Form Factor — Cards
  • Eliminate interference. Some possible causes of interference are:
    • Power, keyboard, and mouse extension cables
    • Too many devices on a power strip
    • Multiple power strips connected to the same electrical outlet

Diagnostic Lights

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.

To help troubleshoot a problem, your computer has four lights labeled 1, 2, 3, and 4 on the front panel.

NOTE: If you are using an ultra form factor computer, the diagnostic lights are present on the back panel. See the Setup and Quick Reference Guide that ships with your computer for more information.

When the computer starts normally, the lights flash, and then turn off. If the computer malfunctions, use the sequence of the lights to help identify the problem.

NOTE: After the computer completes POST, all four lights turn off before booting to the operating system.

Diagnostic Light Codes During POST

Light Pattern

Problem Description

Suggested Resolution

Off

The computer is either turned off or not receiving power.
  • Reseat the power cable in the power connector on the back of the computer and the electrical outlet.
  • Bypass power strips, power extension cables, and other power protection devices to verify that the computer turns on properly.
  • Ensure that any power strips being used are plugged into an electrical outlet and are turned on.
  • Ensure that the electrical outlet is working by testing it with another device, such as a lamp.
  • Ensure that the main power cable and front panel cable are securely connected to the system board.

Off

A possible motherboard failure has occurred.
  • Unplug the computer. Allow a minute for the power to drain. Plug the computer into a working electrical outlet and press the power button.
  • If the problem persists, contact Dell (see Contacting Dell).

Blinking Amber

A possible motherboard, power supply, or peripheral failure has occurred.
  • Power off computer, leaving the computer plugged in. Press and hold the power supply test button on the back of the power supply unit.

If the power supply diagnostic light next to the switch illuminates, the problem may be with your system board. Contact Dell (see Contacting Dell).

If the power supply diagnostic light next to the switch does not illuminate, disconnect all internal and external peripherals, and press and hold the power supply test button.If it illuminates, there could be a problem with a peripheral. Contact Dell (see Contacting Dell).

  • If the power supply diagnostic light still does not illuminate, disconnect the power supply from the system board, then press and hold the power supply button.

If the light illuminates, there could be a problem with the system board.

If the power supply diagnostic light still does not illuminate, the problem is probably with the power supply.

Contact Dell (see Contacting Dell).

Steady Amber

No CPU present.
  • Reinstall the processor and restart the system. If the computer still fails to boot, inspect the processor socket for damage.
  • If the problem persists, contact Dell (see Contacting Dell).

Steady Amber

Memory modules are detected, but a memory power failure has occurred.
  • If two or more memory modules are installed, remove the modules, then reinstall one module and restart the computer.

If the computer starts normally, continue to install additional memory modules (one at a time) until you have identified a faulty module or reinstalled all modules without error.

If only one memory module is installed, try moving it to a different DIMM connector and restart the computer.

  • If available, install verified working memory of the same type into your computer.
  • If the problem persists, contact Dell (see Contacting Dell).

Steady Amber

A possible CPU or motherboard failure has occurred.
  • Replace the processor with a known good processor. If the computer still fails to boot, inspect the processor socket for damage.
  • If the problem persists, contact Dell (see Contacting Dell).

Steady Amber

BIOS may be corrupt or missing.
  • The computer hardware is operating normally but the BIOS may be corrupt or missing. Contact Dell (see Contacting Dell).

Steady Amber

A possible motherboard failure has occurred.
  • Remove all cards from the PCI and PCI-E slots and restart the computer. If the computer boots, add the cards back one by one until you find the bad one.
  • If the problem persists, the system board may be faulty. Contact Dell (see Contacting Dell).

Steady Amber

Power connector not installed properly.
  • Reseat the 2x2 power connector from the power supply unit.
  • If the computer still fails to boot, contact Dell (see Contacting Dell).

Steady Amber

Possible peripheral card or motherboard failure has occurred.
  • Remove all cards from the PCI and PCI-E slots and restart the computer. If the computer boots, add the cards back one by one until you find the faulty one.
  • If the problem persists, the system board is probably bad. Contact Dell (see Contacting Dell).

Steady Amber

A possible motherboard failure has occurred.
  • Disconnect all internal and external peripherals, and restart the computer. If the computer boots, add the peripheral back one by one until you find the faulty one. Contacting Dell.
  • If the problem persists, the system board is probably bad. Contact Dell (see Contacting Dell).

Steady Amber

A possible coin cell battery failure has occurred.
  • Remove the coin cell battery for one minute, reinstall the battery, and restart.
  • If the problem persists, contact Dell (see Contacting Dell).

Steady
Green

The computer is in a normal on condition.

The diagnostic lights are not lit after the computer successfully boots to the operating system.
  • Ensure that the display is connected and powered on.
  • If the problem persists, contact Dell (see Contacting Dell).

Steady
Green

A possible processor failure has occurred.
  • Reseat the processor (see Processor information for your computer).
  • If the problem persists, contact Dell (see Contacting Dell).

Steady
Green

Memory modules are detected, but a memory failure has occurred.
  • If two or more memory modules are installed, remove the modules and then reinstall one module (see Memory).

Restart the computer. If the computer starts normally, continue to install additional memory modules (one at a time) until you have identified a faulty module or reinstalled all modules without error.

  • If available, install working memory of the same type into your computer (see Memory).
  • If the problem persists, contact Dell (see Contacting Dell).

Steady
Green

A possible graphics card failure has occurred.
  • Reseat any installed graphics cards (see the "Cards" section for your computer).
  • If available, install a working graphics card into your computer.
  • If the problem persists, contact Dell (see Contacting Dell).

Steady
Green

A possible floppy drive or hard drive failure has occurred.

Reseat all power and data cables.

Steady
Green

A possible USB failure has occurred.

Reinstall all USB devices and check all cable connections.

Steady
Green

No memory modules are detected.
  • If two or more memory modules are installed, remove the modules (see Removing Memory Module (s)), then reinstall one module (see Installing Memory Module (s)) and restart the computer.

If the computer starts normally, continue to install additional memory modules (one at a time) until you have identified a faulty module or reinstalled all modules without error.

  • If available, install working memory of the same type into your computer (see Memory).
  • If the problem persists, contact Dell (see Contacting Dell).

Steady
Green

Memory modules are detected, but a memory configuration or compatibility error has occurred.
  • Ensure that no special requirements for memory module/connector placement exist.
  • Ensure that the memory you are using is supported by your computer (see the Setup and Quick Reference Guide that ships with your computer).
  • If the problem persists, contact Dell (see Contacting Dell).

Steady
Green

A possible expansion card failure has occurred.
  • Determine if a conflict exists by removing an expansion card (not a graphics card) and restarting the computer (see the "Cards" section for your computer).
  • If the problem persists, reinstall the card you removed, then remove a different card and restart the computer.
  • Repeat this process for each expansion card installed. If the computer starts normally, troubleshoot the last card removed from the computer for resource conflicts.
  • If the problem persists, contact Dell (see Contacting Dell).

Steady
Green

Another failure has occurred.
  • Ensure that all hard drive and optical drive cables are properly connected to the system board (see the "System Board Components" section for your computer).
  • If there is an error message on the screen identifying a problem with a device (such as the floppy drive or hard drive), check the device to make sure it is functioning properly.
  • If the operating system is attempting to boot from a device (such as the floppy drive or optical drive), check system setup to ensure the boot sequence is correct for the devices installed on your computer.
  • If the problem persists, contact Dell (see Contacting Dell).

Blinking Green

The computer is in standby mode.

Press a key on the keyboard, move the mouse, or press the power button to resume normal operation.

Power Supply Diagnostic Light

The power supply diagnostic light located on the back of the computer, near the power connector. The light remains solid or off to indicate different states:

  • No light — Indicates no power available for the power supply or the power supply is not working.
  • Green light — Indicates power availability for the power supply.

Beep Codes

Your computer may emit a series of beeps during start-up if the monitor cannot display errors or problems. For example, one possible beep code may consist of three short, repeated beeps indicating that the computer has encountered a possible system board failure.

If your computer emits a series of beeps during start-up:

  1. Write down the beep code.
  2. Run the Dell Diagnostics to further identify the problem. (see Dell Diagnostics).

    Code

    Cause

    2 short, 1 long

    BIOS checksum error

    1 long, 3 short, 2 short

    Memory error

    1 short

    F12 key pressed

Code (repetitive short beeps)

Description

Suggested Resolution

1

BIOS checksum failure. Possible system board failure.

Contact Dell (see Contacting Dell).

2

No memory modules are detected.
  • If two or more memory modules are installed, remove the modules, then reinstall one module and restart the computer. If the computer starts normally, continue to install additional memory modules (one at a time) until you have identified a faulty module or reinstalled all modules without error. See Memory.
  • If available, install working memory of the same type into your computer. See Memory.
  • If the problem persists, contact Dell (see Contacting Dell).

3

Possible system board failure.

Contact Dell (see Contacting Dell).

4

RAM Read/Write failure.
  • Ensure that no special requirements for memory module/connector placement exist. See Memory.
  • Ensure that the memory you are using is supported by your computer. See Memory.
  • If the problem persists, contact Dell (see Contacting Dell).

5

Real time clock failure. Possible battery or system board failure.
  • Replace the battery. See Replacing the Battery.
  • If the problem persists, contact Dell (see Contacting Dell).

6

Video BIOS Test Failure.

Contact Dell (see Contacting Dell).

System Messages

NOTE: If the message you received is not listed in the table, see the documentation for either the operating system or the program that was running when the message appeared.

Alert! Previous attempts at booting this system have failed at checkpoint [nnnn]. For help in resolving this problem, please note this checkpoint and contact Dell Technical Support — The computer failed to complete the boot routine three consecutive times for the same error (see Contacting Dell for assistance).

CMOS checksum error — Possible system board failure or RTC battery low. Replace the battery (see Battery or see Contacting Dell for assistance).

CPU fan failure — CPU fan failure. Replace the CPU fan. See the following:

  • Mini Tower — Heat Sink and Processor
  • Desktop — Heat Sink Assembly
  • Small Form Factor — Heat Sink and Processor
  • Ultra Small Form Factor — Heat Sink and Processor

Floppy diskette seek failure — A cable may be loose, or the computer configuration information may not match the hardware configuration. Check cable connections (see Contacting Dell for assistance).

Diskette read failure — The floppy disk may be defective or a cable may be loose. Replace the floppy disk or check for a loose cable connection.

Hard-disk read failure — Possible hard drive failure during hard-drive boot test (see Contacting Dell for assistance).

Keyboard failure —

Keyboard failure or keyboard cable loose (see Keyboard Problems).

No boot device available — The system cannot detect a bootable device or partition.

    • If the floppy drive is your boot device, ensure that the cables are connected and that a bootable floppy disk is in the drive.
    • If the hard drive is your boot device, ensure that the cables are connected and that the drive is installed properly and partitioned as a boot device.
    • Enter System Setup and ensure that the boot sequence information is correct (see System Setup).

No timer tick interrupt — A chip on the system board might be malfunctioning or motherboard failure (see Contacting Dell for assistance).

Non-system disk or disk error — Replace the floppy disk with one that has a bootable operating system or remove the floppy disk and restart the computer.

Not a boot diskette — Insert a bootable floppy disk and restart your computer.

NOTICE – Hard Drive SELF MONITORING SYSTEM has reported that a parameter has exceeded its normal operating range. Dell recommends that you back up your data regularly. A parameter out of range may or may not indicate a potential hard drive problem. —

S.M.A.R.T error, possible HDD failure. This feature can be enabled or disabled in the system setup.

Hardware Troubleshooter

If a device is either not detected during the operating system setup or is detected, but incorrectly configured, you can use the Hardware Troubleshooter to resolve the incompatibility.

Windows XP:

  1. Click Start ® Help and Support.
  2. Type hardware troubleshooter in the search field and press <Enter> to start the search.
  3. In the Fix a Problem section, click Hardware Troubleshooter.
  4. In the Hardware Troubleshooter list, select the option that best describes the problem and click Next to follow the remaining troubleshooting steps.

Windows Vista:

  1. Click the Windows Vista start button , and click Help and Support.
  2. Type hardware troubleshooter in the search field and press <Enter> to start the search.
  3. In the search results, select the option that best describes the problem and follow the remaining troubleshooting steps.

Dell Diagnostics

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.

When to Use the Dell Diagnostics

If you experience a problem with your computer, perform the checks in Solving Problems, and then run the Dell Diagnostics before contacting Dell for assistance.

Start the Dell Diagnostics from your hard drive or from the Drivers and Utilities media provided with your computer.

NOTE: The Drivers and Utilities media is optional and may not ship with your computer.
NOTE: The Dell Diagnostics only operate on Dell computers.

Starting the Dell Diagnostics From Your Hard Drive

Before running the Dell Diagnostics, enter System Setup (see the Entering System Setup) to review your computer's configuration information, and ensure that the device you want to test is displayed in System Setup and is active.

The Dell Diagnostics is located on a separate diagnostic utility partition on your hard drive.

NOTE: If your computer does not display a screen image, contact Dell (see Contacting Dell).
  1. Ensure that the computer is connected to an electrical outlet that is known to be working properly.
  2. Turn on (or restart) your computer.
  3. When the DELL logo appears, press <F12> immediately.
NOTE: Keyboard failure may result when a key is held down for extended periods of time. To avoid possible keyboard failure, press and release <F12> in even intervals to open the Boot Device Menu.

If you wait too long and the operating system logo appears, continue to wait until you see the Microsoft Windows desktop, then shut down your computer and try again.

  1. Use the up- and down-arrow keys to select Diagnostics from the boot menu and then press <Enter>.
  1. Press any key to start the Dell Diagnostics from the diagnostics utility partition on your hard drive.
  2. Press <Tab> to select Test System and then press <Enter>.
NOTE: It is recommended that you select Test System to run a complete test on your computer. Selecting Test Memory initiates the extended memory test, which can take up to thirty minutes or more to complete. When the test completes, record the test results and then press any key to return to the previous menu.
  1. At the Dell Diagnostics Main Menu, left-click with the mouse, or press <Tab> and then <Enter>, to select the test you want to run (see Dell Diagnostics Main Menu).
NOTE: Write down any error codes and problem descriptions exactly as they appear and follow the instructions on the screen.
  1. After all tests have completed, close the test window to return to the Dell Diagnostics Main Menu.
  2. Close the Main Menu window to exit the Dell Diagnostics and restart the computer.

Starting the Dell Diagnostics From the Drivers and Utilities Media

Before running the Dell Diagnostics, enter System Setup (see Entering System Setup) to review your computer's configuration information, and ensure that the device you want to test is displayed in System Setup and is active.

  1. Insert the Drivers and Utilities media into the optical drive.
  2. Restart your computer.
  3. When the DELL logo appears, press <F12> immediately.
NOTE: Keyboard failure may result when a key is held down for extended periods of time. To avoid possible keyboard failure, press and release <F12> in even intervals to open the Boot Device Menu.

If you wait too long and the operating system logo appears, continue to wait until you see the Microsoft Windows desktop, then shut down your computer and try again.

  1. When the boot device list appears, use the up- or down- arrow keys to highlight CD/DVD/CD-RW Drive then press <Enter>.
NOTE: Using the one-time boot menu changes the boot sequence for the current boot only. Upon restart, the computer boots according to the boot sequence specified in System Setup.
  1. Press any key to confirm that you want to start from the CD/DVD.

If you wait too long and the operating system logo appears, continue to wait until you see the Microsoft Windows desktop, then shut down your computer and try again.

  1. Type 1 to Run the 32 Bit Dell Diagnostics.
  2. At the Dell Diagnostics Menu, type 1 to select Dell 32-bit Diagnostics for Resource CD (graphical user interface).
  3. Press <Tab> to select Test System and then press <Enter>.
NOTE: It is recommended that you select Test System to run a complete test on your computer. Selecting Test Memory initiates the extended memory test, which can take up to thirty minutes or more to complete. When the test completes, record the test results and then press any key to return to the previous menu.
  1. At the Dell Diagnostics Main Menu, left-click with the mouse, or press <Tab> and then <Enter>, to select the test you want to run (see Dell Diagnostics Main Menu).
NOTE: Write down any error codes and problem descriptions exactly as they appear and follow the instructions on the screen.
  1. After all tests have completed, close the test window to return to the Dell Diagnostics Main Menu.
  2. Close the Main Menu window to exit the Dell Diagnostics and restart the computer.
  3. Remove the Drivers and Utilities media from the optical drive.

Dell Diagnostics Main Menu

After the Dell Diagnostics loads the following menu appears:

Option

Function

Test Memory

Run the stand-alone memory test

Test System

Run system diagnostics

Exit

Exit the diagnostics

Press <Tab> to select the test you want to run and then press <Enter>.

NOTE: It is recommended that you select Test System to run a complete test on your computer. Selecting Test Memory initiates the extended memory test, which can take up to thirty minutes or more to complete. When the test completes, record the test results and then press any key to return to this menu.

After Test System is selected, the following menu appears:

Option

Function

Express Test

Performs a quick test of devices in the system. This typically can take 10 to 20 minutes.

NOTE: The Express Test requires no interaction on your part. Run Express Test first to increase the possibility of tracing a problem quickly.

Extended Test

Performs a thorough check of devices in the system. This typically can take an hour or more.

NOTE: The Extended Test periodically requires your input to answer specific questions.

Custom Test

Use to test a specific device or customize the tests to be run.

Symptom Tree

This option allows you to select tests based on a symptom of the problem you are having. This option lists the most common symptoms.

NOTE: It is recommended that you select Extended Test to perform a more thorough check of devices in the computer.

For any problem encountered during a test, a message appears with an error code and a description of the problem. Write down the error code and problem description exactly as it appears and follow the instructions on the screen. If you cannot resolve the problem, contact Dell (see Contacting Dell).

NOTE: When contacting Dell support, have your Service Tag ready. The Service Tag for your computer is located at the top of each test screen.

The following tabs provide additional information for tests run from the Custom Test or Symptom Tree option:

Tab

Function

Results

Displays the results of the test and any error conditions encountered.

Errors

Displays error conditions encountered, error codes, and the problem description.

Help

Describes the test and any requirements for running the test.

Configuration

Displays the hardware configuration for the selected device.

The Dell Diagnostics obtains configuration information for all devices from System Setup, memory, and various internal tests, and displays the information in the device list in the left pane of the screen.

NOTE: The device list may not display the names of all components installed on your computer or all devices attached to your computer.

Parameters

Allows you to customize the test, if applicable, by changing the test settings.

Solving Problems

Follow these tips when troubleshooting your computer:

  • If you added or removed a part before the problem started, review the installation procedures and ensure that the part is correctly installed.
  • If a peripheral device does not work, ensure that the device is properly connected.
  • If an error message appears on the screen, write down the exact message. This message may help support personnel diagnose and fix the problem(s).
  • If an error message occurs in a program, see the program's documentation.
NOTE: The procedures in this document were written for the Windows default view, so they may not apply if you set your Dell™ computer to the Windows Classic view.

Battery Problems

WARNING: There is a danger of a new battery exploding if it is incorrectly installed. Replace the battery only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer's instructions.
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.

Replace the battery —

If you have to repeatedly reset time and date information after turning on the computer, or if an incorrect time or date displays during start-up, replace the battery (see "Replacing the Battery" on page 157). If the battery still does not work properly, contact Dell (see Contacting Dell).

Drive Problems

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.

Ensure that Microsoft® Windows® Recognizes the drive —

Windows XP:

  • Click Start and click My Computer.

Windows Vista™:

  • Click the Windows Vista Start button and click Computer.

If the drive is not listed, perform a full scan with your antivirus software to check for and remove viruses. Viruses can sometimes prevent Windows from recognizing the drive.

Test the drive —

  • Insert another disc to eliminate the possibility that the original drive is defective.
  • Insert a bootable floppy disk and restart the computer.

Clean the drive or disk —

See the Dell™ Technology Guide for more information on cleaning your computer.

Check the cable connections

Run the Hardware Troubleshooter —

See Hardware Troubleshooter on page 83.

Run the Dell Diagnostics —

See Dell Diagnostics.

Optical drive problems

NOTE: High-speed optical drive vibration is normal and may cause noise, which does not indicate a defect in the drive or the media.
NOTE: Because of different regions worldwide and different disc formats, not all DVD titles work in all DVD drives.

Adjust the Windows volume control —

  • Click the speaker icon in the lower-right corner of your screen.
  • Ensure that the volume is turned up by clicking the sidebar and dragging it up.
  • Ensure that the sound is not muted by clicking any boxes that are checked.

Check the speakers and subwoofer —

See Sound and Speaker Problems.

Problems writing to an optical drive

Close other programs —

The optical drive must receive a steady stream of data during the writing process. If the stream is interrupted, an error occurs. Try closing all programs before you write to the optical.

Turn off standby mode in Windows before writing to a disc —

Search for the keyword standby in Windows Help and Support for information on power management modes.

Hard drive problems

Run Check Disk —

Windows XP:

  1. Click Start and click My Computer.
  2. Right-click Local Disk C:.
  3. Click Properties ® Tools ® Check Now.
  4. Click Scan for and attempt recovery of bad sectors and click Start.

Windows Vista:

  1. Click Start and click Computer.
  2. Right-click Local Disk C:.
  3. Click Properties ® Tools ® Check Now.

The User Account Control window may appear. If you are an administrator on the computer, click Continue; otherwise, contact your administrator to continue the desired action.

  1. Follow the instructions on the screen.

Error Messages

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.

If the error message is not listed, see the documentation for the operating system or the program that was running when the message appeared.

A filename cannot contain any of the following characters: \ / : * ? " < > | — Do not use these characters in filenames.

A required .DLL file was not found — The program that you are trying to open is missing an essential file. To remove and then reinstall the program:

Windows XP:

  1. Click Start ® Control Panel ® Add or Remove Programs ® Programs and Features .
  2. Select the program you want to remove.
  3. Click Uninstall.
  4. See the program documentation for installation instructions.

Windows Vista:

  1. Click Start ® Control Panel ® Programs ® Programs and Features .
  2. Select the program you want to remove.
  3. Click Uninstall.
  4. See the program documentation for installation instructions.

drive letter :\ is not accessible. The device is not ready — The drive cannot read the disk. Insert a disk into the drive and try again.

Insert bootable media — Insert a bootable floppy disk, CD, or DVD.

Non-system disk error — Remove the floppy disk from the floppy drive and restart your computer.

Not enough memory or resources. Close some programs and try again — Close all windows and open the program that you want to use. In some cases, you may have to restart your computer to restore computer resources. If so, run the program that you want to use first.

Operating system not found — Contact Dell (see Contacting Dell).

IEEE 1394 Device Problems

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.
NOTE: Your computer supports only IEEE 1394a standard.

Ensure that the cable for the IEEE 1394 device is properly inserted into the device and into the connector on the computer

Ensure that the IEEE 1394 device is enabled in system setup — See System Setup Options.

Ensure that the IEEE 1394 device is recognized by Windows —

Windows XP:

  1. Click Start and click Control Panel.
  2. Under Pick a Category, click Performance and Maintenance ® System ® System Properties ® Hardware ® Device Manager.

Windows Vista:

  1. Click Start ® Control Panel ® Hardware and Sound .
  2. Click Device Manager.

If your IEEE 1394 device is listed, Windows recognizes the device.

If you have problems with a Dell IEEE 1394 device —

Contact Dell (see Contacting Dell).

If you have problems with an IEEE 1394 device not provided by Dell — Contact the IEEE 1394 device manufacturer.

Keyboard Problems

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.

Check the keyboard cable —

  • Ensure that the keyboard cable is firmly connected to the computer.
  • Shut down the computer (see Before Working on Your Computer), reconnect the keyboard cable as shown on the setup diagram for your computer, and then restart the computer.
  • Ensure that the cable is not damaged or frayed and check cable connectors for bent or broken pins. Straighten any bent pins.
  • Remove any keyboard extension cables and connect the keyboard directly to the computer.

Test the keyboard — Connect a properly working keyboard to the computer, then try using the keyboard.

Run the Hardware Troubleshooter —

See Hardware Troubleshooter.

Lockups and Software Problems

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.

The computer does not start up

Check the diagnostic lights —

See Diagnostic Lights.

Ensure that the power cable is firmly connected to the computer and to the electrical outlet

The computer stops responding

CAUTION: You may lose data if you are unable to perform an operating system shutdown.

Turn the computer off — If you are unable to get a response by pressing a key on your keyboard or moving your mouse, press and hold the power button for at least 8 to 10 seconds (until the computer turns off), and then restart your computer.

A program stops responding

End the program —

  1. Press <Ctrl><Shift><Esc> simultaneously to access the Task Manager.
  2. Click the Applications tab.
  3. Click to select the program that is no longer responding.
  4. Click End Task.

A program crashes repeatedly

NOTE: Most software includes installation instructions in its documentation or on a floppy disk, CD, or DVD.

Check the software documentation —

If necessary, uninstall and then reinstall the program.

A program is designed for an earlier Windows operating system

Run the Program Compatibility Wizard —

Windows XP:

The Program Compatibility Wizard configures a program so that it runs in an environment similar to non-XP operating system environments.

  1. Click Start ® All Programs ® Accessories ® Program Compatibility Wizard ® Next .
  2. Follow the instructions on the screen.

Windows Vista:

The Program Compatibility Wizard configures a program so that it runs in an environment similar to non-Windows Vista operating system environments.

  1. Click Start ® Control Panel ® Programs ® Use an older program with this version of Windows.
  2. In the welcome screen, click Next.
  3. Follow the instructions on the screen.

A solid blue screen appears

Turn the computer off — If you are unable to get a response by pressing a key on your keyboard or moving your mouse, press and hold the power button for at least 8 to 10 seconds (until the computer turns off), and then restart your computer.

Other software problems

Check the software documentation or contact the software manufacturer for troubleshooting information —

  • Ensure that the program is compatible with the operating system installed on your computer.
  • Ensure that your computer meets the minimum hardware requirements needed to run the software. See the software documentation for information.
  • Ensure that the program is installed and configured properly.
  • Verify that the device drivers do not conflict with the program.
  • If necessary, uninstall and then reinstall the program.

Back up your files immediately

Use a virus-scanning program to check the hard drive, floppy disks, CDs, or DVDs

Save and close any open files or programs and shut down your computer through the Start menu

Memory Problems

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.

If you receive an insufficient memory message —

  • Save and close any open files and exit any open programs you are not using to see if that resolves the problem.
  • See the software documentation for minimum memory requirements. If necessary, install additional memory (see Installing Memory Module (s)).
  • Reseat the memory modules (see Memory) to ensure that your computer is successfully communicating with the memory.
  • Run the Dell Diagnostics (see Dell Diagnostics).

If you experience other memory problems —

  • Reseat the memory modules (see Memory) to ensure that your computer is successfully communicating with the memory.
  • Ensure that you are following the memory installation guidelines (see Installing Memory Module (s)).
  • Ensure that the memory you are using is supported by your computer. For more information about the type of memory supported by your computer, see Memory.
  • Run the Dell Diagnostics (see Dell Diagnostics).

Mouse Problems

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.

Check the mouse cable —

  • Ensure that the cable is not damaged or frayed and check cable connectors for bent or broken pins. Straighten any bent pins.
  • Remove any mouse extension cables, and connect the mouse directly to the computer.
  • Verify that the mouse cable is connected as shown on the setup diagram for your computer.

Restart the computer —

  1. Simultaneously press <Ctrl><Esc> to display the Start menu.
  2. Press <u>, press the up- and down-arrow keys to highlight Shut down or Turn Off, and then press <Enter>.
  3. After the computer turns off, reconnect the mouse cable as shown on the setup diagram.
  4. Turn on the computer.

Test the mouse — Connect a properly working mouse to the computer, then try using the mouse.

Check the mouse settings —

Windows XP

  1. Click Start ® Control Panel ® Mouse.
  2. Adjust the settings as needed.

Windows Vista:

  1. Click Start ® Control Panel ® Hardware and Sound ® Mouse .
  2. Adjust the settings as needed.

Reinstall the mouse driver

Run the Hardware Troubleshooter — See Hardware Troubleshooter.

Network Problems

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.

Check the network cable connector — Ensure that the network cable is firmly inserted into the network connector on the back of the computer and the network jack.

Check the network lights on the back of the computer — If the link integrity light is off, no network communication is occurring. Replace the network cable.

Restart the computer and log on to the network again

Check your network settings — Contact your network administrator or the person who set up your network to verify that your network settings are correct and that the network is functioning.

Run the Hardware Troubleshooter — See Hardware Troubleshooter.

Power Problems

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.

If the power light is blue and the computer is not responding — See Diagnostic Lights.

If the power light is blinking green — The computer is in standby mode. Press a key on the keyboard, move the mouse, or press the power button to resume normal operation.

If the power light is off — The computer is either turned off or is not receiving power.

  • Reseat the power cable in the power connector on the back of the computer and the electrical outlet.
  • Bypass power strips, power extension cables, and other power protection devices to verify that the computer turns on properly.
  • Ensure that any power strips being used are plugged into an electrical outlet and are turned on.
  • Ensure that the electrical outlet is working by testing it with another device, such as a lamp.
  • Ensure that the main power cable and front panel cable are securely connected to the system board (see the "System Board Components" section for your computer).

If the power light is blinking amber — The computer is receiving electrical power, but an internal power problem may exist.

  • Ensure that the voltage selection switch is set to match the AC power at your location (if applicable).
  • Ensure that all components and cables are properly installed and securely connected to the system board (see the "System Board Components" section for your computer).

If the power light is steady amber — A device may be malfunctioning or incorrectly installed.

  • Ensure that the processor power cable is securely connected to the system board power connector (POWER2) (see "System Board Components" section of the Service Manual for your computer).
  • Remove and then reinstall all memory modules (see Memory).
  • Remove and then reinstall any expansion cards, including graphics cards (see the "Removing PCI and PCI Express Cards" section for your computer).

Eliminate interference — Some possible causes of interference are:

  • Power, keyboard, and mouse extension cables
  • Too many devices connected to the same power strip
  • Multiple power strips connected to the same electrical outlet

Printer Problems

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.
NOTE: If you need technical assistance for your printer, contact the printer's manufacturer.

Check the printer documentation — See the printer documentation for setup and troubleshooting information.

Ensure that the printer is turned on

Check the printer cable connections —

  • See the printer documentation for cable connection information.
  • Ensure that the printer cables are securely connected to the printer and the computer.

Test the electrical outlet — Ensure that the electrical outlet is working by testing it with another device, such as a lamp.

Verify that the printer is recognized by Windows —

Windows XP:

  1. Click Start ® Control Panel ® Printers and Other Hardware ® View installed printers or fax printers.
  2. If the printer is listed, right-click the printer icon.
  3. Click Properties ® Ports. For a parallel printer, ensure that the Print to the following port(s): setting is LPT1 (Printer Port). For a USB printer, ensure that the Print to the following port(s): setting is USB.

Windows Vista:

  1. Click Start ® Control Panel ® Hardware and Sound ® Printer .
  2. If the printer is listed, right-click the printer icon.
  3. Click Properties and click Ports.
  4. Adjust the settings, as needed.

Reinstall the printer driver —

See the printer documentation for information on reinstalling the printer driver.

Scanner Problems

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.
NOTE: If you need technical assistance for your scanner, contact the scanner's manufacturer.

Check the scanner documentation — See the scanner documentation for setup and troubleshooting information.

Unlock the scanner — Ensure that your scanner is unlocked (if the scanner has a locking tab or button).

Restart the computer and try the scanner again

Check the cable connections —

  • See the scanner documentation for information on cable connections.
  • Ensure that the scanner cables are securely connected to the scanner and the computer.

Verify that the scanner is recognized by Microsoft Windows —

Windows XP:

  1. Click Start ® Control Panel ® Printers and Other Hardware ® Scanners and Cameras.
  2. If your scanner is listed, Windows recognizes the scanner.

Windows Vista:

  1. Click Start ® Control Panel ® Hardware and Sound ® Scanners and Cameras .
  2. If the scanner is listed, Windows recognizes the scanner.

Reinstall the scanner driver — See the scanner documentation for instructions.

Sound and Speaker Problems

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.

No sound from speakers

NOTE: The volume control in MP3 and other media players may override the Windows volume setting. Always check to ensure that the volume on the media player(s) has not been turned down or off.

Check the speaker cable connections — Ensure that the speakers are connected as shown on the setup diagram supplied with the speakers. If you purchased a sound card, ensure that the speakers are connected to the card.

Ensure that the subwoofer and the speakers are turned on — See the setup diagram supplied with the speakers. If your speakers have volume controls, adjust the volume, bass, or treble to eliminate distortion.

Adjust the Windows volume control — Click or double-click the speaker icon in the lower-right corner of your screen. Ensure that the volume is turned up and that the sound is not muted.

Disconnect headphones from the headphone connector — Sound from the speakers is automatically disabled when headphones are connected to the computer's front-panel headphone connector.

Test the electrical outlet — Ensure that the electrical outlet is working by testing it with another device, such as a lamp.

Eliminate possible interference — Turn off nearby fans, fluorescent lights, or halogen lamps to check for interference.

Run the speaker diagnostics

Reinstall the sound driver

Run the Hardware Troubleshooter — See Hardware Troubleshooter.

No sound from headphones

Check the headphone cable connection — Ensure that the headphone cable is securely inserted into the headphone connector (see the Setup and Quick Reference Guide that ships with your computer for more information).

Adjust the Windows volume control — Click or double-click the speaker icon in the lower-right corner of your screen. Ensure that the volume is turned up and that the sound is not muted.

Video and Monitor Problems

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.
CAUTION: If your computer came with a PCI graphics card installed, removal of the card is not necessary when installing additional graphics cards; however, the card is required for troubleshooting purposes. If you remove the card, store it in a safe and secure location. For information about your graphics card, go to support.dell.com.

The screen is blank

NOTE: For troubleshooting procedures, see the monitor's documentation.

The screen is difficult to read

Check the monitor cable connection —

  • Ensure that the monitor cable is connected to the correct graphics card (for dual graphics card configurations).
  • If you are using the optional DVI-to-VGA adapter, ensure that the adapter is correctly attached to the graphics card and monitor.
  • Ensure that the monitor cable is connected as shown on the setup diagram for your computer.
  • Remove any video extension cables and connect the monitor directly to the computer.
  • Swap the computer and monitor power cables to determine if the monitor's power cable is defective.
  • Check the connectors for bent or broken pins (it is normal for monitor cable connectors to have missing pins).

Check the monitor power light —

  • If the power light is lit or blinking, the monitor has power.
  • If the power light is off, firmly press the button to ensure that the monitor is turned on.
  • If the power light is blinking, press a key on the keyboard or move the mouse to resume normal operation.

Test the electrical outlet — Ensure that the electrical outlet is working by testing it with another device, such as a lamp.

Check the diagnostic lights —

See Diagnostic Lights.

Check the monitor settings — See the monitor documentation for instructions on adjusting the contrast and brightness, demagnetizing (degaussing) the monitor, and running the monitor self-test.

Move the subwoofer away from the monitor — If your speaker system includes a subwoofer, ensure that the subwoofer is positioned at least 60 centimeters (2 feet) away from the monitor.

Move the monitor away from external power sources — Fans, fluorescent lights, halogen lamps, and other electrical devices can cause the screen image to appear shaky. Turn off nearby devices to check for interference.

Rotate the monitor to eliminate sunlight glare and possible interference

Adjust the Windows display settings —

Windows XP:

  1. Click Start ® Control Panel ® Appearance and Themes.
  2. Click the area you want to change or click the Display icon.
  3. Try different settings for Color quality and Screen resolution.

Windows Vista:

  1. Click Start ® Control Panel ® Hardware and Sound ® Personalization ® Display Settings .
  2. Adjust Resolution and Colors settings, as needed.

3D image quality is poor

Check the graphics card power cable connection — Ensure that the power cable for the graphics card(s) is correctly attached to the card.

Check the monitor settings — See the monitor documentation for instructions on adjusting the contrast and brightness, demagnetizing (degaussing) the monitor, and running the monitor self-test.

Only part of the display is readable

Connect an external monitor —

  1. Shut down your computer and connect an external monitor to the computer.
  2. Turn on the computer and the monitor and adjust the monitor brightness and contrast controls.

If the external monitor works, the computer display or video controller may be defective. Contact Dell (see Contacting Dell).

Dell Technical Update Service

The Dell Technical Update service provides proactive e-mail notification of software and hardware updates for your computer. The service is free and can be customized for content, format, and how frequently you receive notifications.

To enroll for the Dell Technical Update service, go to support.dell.com/technicalupdate.

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Source: http://support.feelpcs.com/pc-spec/Optiplex760/trouble.htm

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