Dual-Core Intel® Xeon® Processor LV and Intel
®
3100 Chipset
January 2007
User’s Manual
Order Number: 315879-002
55
Error Messages and Beep Codes
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.
5.3
BIOS Error Messages
Table 23
lists the error messages and provides a brief description of each.
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.
Table 22.
Beep Code Types
Type
Pattern Frequency
Memory Error
Three long beeps
1280 Hz
Thermal Warning
Four alternating beeps: High tone, low tone, high
tone, low tone
High tone: 2000 Hz
Low tone: 1600 Hz
Table 23.
BIOS Error Messages
Error Message
Explanation
CMOS Battery Low
The battery may be losing power. Replace the battery soon.
CMOS Checksum Bad
The CMOS checksum is incorrect. CMOS memory may have been corrupted.
Run Setup to reset values.
Memory Size Decreased
Memory size has decreased since the last boot. If no memory was removed
then memory may be bad.
No Boot Device Available
System did not find a device to boot.