Diagnostic Lights - Dell OptiPlex 380 Service Manual

3-3-2 Invalid NVRAM configuration
3-3-4 Video Memory Test failure
3-4-1 Screen initialization failure
3-4-2 Screen retrace failure
3-4-3 Search for video ROM failure
4-2-1 No timer tick
4-2-2 Shutdown failure
4-2-3 Gate A20 failure
4-2-4 Unexpected interrupt in protected mode
4-3-1 Memory failure above address 0FFFFh
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
4-4-2 Failure to decompress code to shadowed memory
4-4-3 Math-coprocessor test failure
4-4-4 Cache test failure
Diagnostic Lights
To help troubleshoot a problem, your computer has four lights labeled 1, 2, 3, and 4 on the bank panel. When the computer starts normally, the lights flash
before turning off. If the computer malfunctions, the sequence of the lights help to identify the problem.
NOTE: After the computer completes POST, all four lights turn off before booting to the operating system.
Light Pattern Problem Description
The computer is in a normal off
condition or a possible pre-BIOS
failure has occurred.
The diagnostic lights are not lit
after the computer successfully
boots to the operating system.
A possible processor failure has
occurred.
Memory modules are detected, but
a memory failure has occurred.
A possible graphics card failure has
occurred.
A possible floppy drive or hard
drive failure has occurred.
A possible USB failure has occurred. Reinstall all USB devices and check all cable connections.
No memory modules are detected.
Memory modules are detected, but
a memory configuration or
compatibility error has occurred.
A possible expansion card failure
has occurred.
Another failure has occurred.
Suggested Resolution
Plug the computer into a working electrical outlet.

If the problem persists, contact Dell.

Reseat the processor (see Processor information for your computer).

If the problem persists, contact Dell.

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 available, install working memory of the same type into your computer.

If the problem persists, contact Dell.

Reseat any installed graphics cards.

If available, install a working graphics card into your computer.

If the problem persists, contact Dell .

Reseat all power and data cables.
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 available, install working memory of the same type into your computer.

If the problem persists, contact Dell.

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 Specifications

section for your computer).
If the problem persists, contact Dell.

Determine if a conflict exists by removing an expansion card (not a graphics card) and

restarting the 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.

Ensure that all hard drive and optical drive cables are properly connected to the system

board .
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.