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5.0
Error Messages and Beep Codes
5.1
Speakers
The CRB-mounted speaker provides audible error message (beep code) information
during POST. The location of the on-board speaker is coordinate D4.
5.2
BIOS Beep Codes
Whenever an error occurs during POST, the BIOS exerts and error tone which indicates
the problem.
Table 22.
Beep Code Types
Type
Memory Error
Thermal Warning
5.3
BIOS Error Messages
Table 23
Table 23.
BIOS Error Messages
Error Message
CMOS Battery Low
CMOS Checksum Bad
Memory Size Decreased
No Boot Device Available
5.4
Port 80h POST Codes
During the POST, the BIOS generates diagnostic progress codes (POST-codes) to I/O
port 80h. If the POST fails or execution stops, the last POST code generated by the
BIOS is left at port 80h. This code is useful for determining the point where an error
occurred.
User's Manual
54
Four alternating beeps: High tone, low tone, high
lists the error messages and provides a brief description of each.
The battery may be losing power. Replace the battery soon.
The CMOS checksum is incorrect. CMOS memory may have been corrupted.
Run Setup to reset values.
Memory size has decreased since the last boot. If no memory was removed
then memory may be bad.
System did not find a device to boot.
Pattern
Three long beeps
tone, low tone
Explanation
Error Messages and Beep Codes
Frequency
1280 Hz
High tone: 2000 Hz
Low tone: 1600 Hz
June 2007
Order Number: 316639-002
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