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20 About Your System
Table 1-3. 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.
The system is in a normal
operating condition
after POST.
Plug the system into a working
electrical outlet and press the
power button.
Information only.
BIOS checksum failure
detected; system is in
recovery mode.
See "Getting Help" on page 149.
Possible processor failure. See "Troubleshooting Processors"
on page 136.
Memory failure. See "Troubleshooting System
Memory" on page 129.
Possible expansion card
failure.
See "Troubleshooting Expansion
Cards" on page 134.
Possible video failure. See "Getting Help" on page 149.
Hard drive failure. Ensure that the hard drives are
properly connected. See "Hard
Drives" on page 63 for
information on the drives
installed in your system.
Possible USB failure. See "Troubleshooting a USB
Device" on page 122.
book.book Page 20 Friday, January 6, 2012 2:11 PM