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About Your System 31
System Beep Codes
If an error that cannot be reported on the screen occurs during POST, the
system may emit a series of beeps that identifies the problem.
NOTE: If the system boots without a keyboard, mouse, or monitor attached, the
system does not issue beep codes related to those peripherals.
If a beep code is emitted, write down the series of beeps and then look it up in
Table 1-6. If you are unable to resolve the problem by looking up the meaning
of the beep code, use system diagnostics to identify the possible cause. If you
are still unable to resolve the problem, see "Getting Help" on page 127.
Possible expansion
card failure.
See "Troubleshooting Expansion
Cards" on page 113.
Other failure. Ensure that the optical drive and
hard drives are properly connected.
See "Troubleshooting Your System"
on page 97 for the appropriate drive
installed in your system.
If the problem persists, see "Getting
Help" on page 127.
The system is in a
normal operating
condition after
POST.
Information only.
Table 1-5. Diagnostic Indicator Codes (continued)
Code Causes Corrective Action
= yellow
= green
= off
A B C D
A B C D
A B C D
book.book Page 31 Thursday, August 30, 2007 3:30 PM