mycomputer does not work

The computer is in a normal "off" condition or a possible pre-BIOS failure has occurred.

The diagnostic lights are not lit after the system successfully boots to the operating system.

Plug the computer into a working electrical outlet. Also see "Power Problems" located in your Owner's Manual.

A possible processor failure has occurred.

Reinstall the processor (see "Processor") and restart the computer.

Memory modules are detected, but a memory failure has occurred.

• If you have two or more memory modules installed, remove the modules, reinstall one module (see "Memory"), and then restart the computer. If the computer starts normally, reinstall an additional module. Continue until you have identified a faulty module or reinstalled all modules without error.
• If available, install properly working memory of the same type into your computer (see "Installing Memory").
• If the problem persists, contact Dell.

A possible graphics card failure has occurred.

• If the computer has a graphics card, remove the card, reinstall it, and then restart the computer.
• If the problem still exists, install a graphics card that you know works and restart the computer.
• If the problem persists, contact Dell.

A possible floppy drive or hard drive failure has occurred.

Reseat all power and data cables and restart the computer.

A possible USB failure has occurred.

Reinstall all USB devices, check cable connections, and then restart the computer.

No memory modules are detected.

• If you have two or more memory modules installed, remove the modules, reinstall one module (see "Memory"), and then restart the computer. If the computer starts normally, reinstall an additional module. Continue until you have identified a faulty module or reinstalled all modules without error.
• If available, install properly working memory of the same type into your computer (see "Installing Memory").
• If the problem persists, see "Contacting Dell" in your Owner's Manual for instructions on obtaining technical assistance.

Memory modules are detected, but a memory configuration or compatibility error exists.

• Ensure that no special memory module/memory connector placement requirements exist.
• Verify that the memory modules that you are installing are compatible with your computer (see "Memory").
• If the problem persists, see "Contacting Dell" in your Owner's Manual for instructions on obtaining technical assistance.

A possible expansion card failure has occurred.

1. Determine if a conflict exists by removing a card (not a graphics card) and restarting the computer (see "Cards").
2. If the problem persists, reinstall the card that you removed, remove a different card, and then restart the computer.
3. Repeat this process for each card. If the computer starts normally, troubleshoot the last card removed from the computer for resource conflicts.
4. If the problem persists, see "Contacting Dell" in your Owner's Manual for instructions on obtaining technical assistance.

Another failure has occurred.

• Ensure that the cables are properly connected to the system board from the hard drive, CD drive, and DVD drive (see "CD/DVD Drive").
• If there is an error message on your 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.
• The operating system is attempting to boot from a device (such as the floppy drive or hard drive); check system setup (see "Boot Sequence") to make sure the boot sequence is correct for the devices installed on your computer.
• If the problem persists, see "Contacting Dell" in your Owner's Manual for instructions on obtaining technical assistance.

1-3-1 through 2-4-4

Memory not being properly identified or used

4-3-1

Memory failure above address 0FFFFh

1-1-2

Microprocessor register failure

1-1-3

NVRAM

1-1-4

ROM BIOS checksum failure

1-2-1

Programmable interval timer

1-2-2

DMA initialization failure

1-2-3

DMA page register read/write failure

3-1-1

Slave DMA register failure

3-1-2

Master DMA register failure

3-1-3

Master interrupt mask register failure

3-1-4

Slave interrupt mask register failure

3-2-2

Interrupt vector loading failure

3-2-4

Keyboard Controller Test failure

3-3-1

NVRAM power loss

3-3-2

NVRAM configuration

3-4-1

Screen initialization failure

3-4-2

Screen retrace failure

4-2-1

No time tick

4-2-2

Shutdown failure

4-2-3

Gate A20 failure

4-2-4

Unexpected interrupt in protected mode

4-3-3

Timer-chip counter 2 failure

4-3-4

Time-of-day clock stopped

4-4-1

Serial or parallel port test failure

4-4-4

Cache test failure