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About Your System 17
Diagnostic Lights
The four diagnostic indicator lights on the system front panel display error
codes during system startup. Table 3-1 lists the causes and possible corrective
actions associated with these codes. A highlighted circle indicates the light is
on; a non-highlighted circle indicates the light is off.
Table 3-1. Diagnostic Indicator Codes
Code Causes Corrective Action
The system 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 system into a working
electrical outlet and press the
power button.
The system is in a normal
operating condition after
POST.
Information only.
BIOS checksum failure
detected; system is in
recovery mode.
See "Getting Help" on page 119.
Possible processor failure. See "Troubleshooting the
Processor" on page 110.
Memory failure. See "Troubleshooting System
Memory" on page 104.
Possible expansion card
failure.
See "Troubleshooting an
Expansion Card" on page 109.
Possible video failure. See "Getting Help" on page 119.
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