Beep Codes and Error Messages
3-1
Chapter 3
Beep Codes and Error Messages
T
his chapter describes beep codes and system error messages that can occur
during system start-up or, in the case of some failures, during normal system
operation. The tables in this chapter list faults that can cause a beep code or sys-
tem error message to occur and the probable causes of the fault in each case.
If a faulty system does not emit beep codes or display system error messages to
indicate a failure, you should use the diagnostics described in Chapter 2 to help
isolate the source of the problem. For hardware removal/replacement proce-
dures, see Chapter 4.
P
OST Beep Codes
If the monitor cannot display error messages during the POST, the system may
emit a series of beeps that identifies the problem or that can help you identify a
faulty component or assembly. Table 3-1 lists the beep codes that may be gener-
ated during the POST. Most beep codes indicate a fatal error that prevents the
system from completing the boot routine until the indicated condition is
corrected.
When the system emits a beep code, record the code and then find it in
Table 3-1. If the table does not lead to the source of the problem, run the appro-
priate tests in the diagnostics to assist in troubleshooting the problem.
Table 3-1. Beep Codes
Code
Cause
Action
1-2
Invalid expansion
ROM checksum
An expansion card could be
improperly seated or faulty.
Ensure that all expansion
cards are properly seated,
and then reboot the system.
Refer to the documentation
that came with the expan-
sion card for troubleshoot-
ing information.
1-2-2-3
Invalid BIOS ROM
checksum
Fatal error. This error usu-
ally requires that you
replace the BIOS firmware.
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