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24 About Your System
Table 1-1. 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 177.
Possible processor failure. See "Troubleshooting the
Processor" on page 163.
Memory failure. See "Troubleshooting System
Memory" on page 155.
Possible expansion card
failure.
See "Troubleshooting Expansion
Cards" on page 162.
Possible video failure. See "Getting Help" on page 177.
Hard drive failure. Ensure that the diskette drive and
hard drive are properly connected.
See "Hard Drives" on page 90 for
information on the drives
installed in your system.
Possible USB failure. See "Troubleshooting a USB
Device" on page 148.
book.book Page 24 Wednesday, August 19, 2009 4:40 PM