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Advanced Troubleshooting: Dell XPS 710 H2C Edition Service Manual
file:///C|/Preeji_working%20folder/Projects/E-Doc/Dimension%20and%20XPS/xps-710-h2c/SM/adtshoot.htm[3/13/2013 11:45:27 AM]
Diagnostic Lights
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the
Product Information Guide.
To help troubleshoot a problem, your computer has four lights labeled 1, 2, 3, and 4 on the front panel (see Front View
).
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
Suggested Resolution
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 (see "Power Problems" in
your Owner's Manual).
If the problem persists, contact Dell (see "Contacting Dell" in your Owner's
Manual).
A possible processor
failure has occurred.
Reseat the processor (see Processor).
If the problem persists, contact Dell (see "Contacting Dell" in your Owner's
Manual).
Memory modules are
detected, but a
memory failure has
occurred.
If two or more memory modules are installed, remove the modules (see
Removing Memory
), then reinstall one module (see Installing Memory) 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 Installing Memory
).
If the problem persists, contact Dell (see "Contacting Dell" in your Owner's
Manual).
A possible graphics
card failure has
occurred.
Reseat any installed graphics cards (see Cards).
If available, install a working graphics card into your computer.
If the problem persists, contact Dell (see "Contacting Dell" in your Owner's
Manual).
A possible floppy
drive or hard drive
failure has occurred.
Reseat all power and data cables.
A possible USB
failure has occurred.
Reinstall all USB devices and check all cable connections.
No memory modules
are detected.
If two or more memory modules are installed, remove the modules (see
Removing Memory
), then reinstall one module (see Installing Memory) 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 Installing Memory
).
If the problem persists, contact Dell (see "Contacting Dell" in your Owner's
Manual).