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Intel Desktop Board DP55SB Product Guide
BIOS Error Messages
When a recoverable error occurs during the POST, the BIOS displays an error message
describing the problem. Table 16 gives an explanation of the BIOS error messages.
Table 16. BIOS Error Messages
Error Message
PROCESSOR_THERMAL_TRIP_ERROR
CMOS_BATTERY_ERROR
CMOS_CHECKSUM_ERROR
CMOS_TIMER_ERROR
MEMORY_SIZE_DECREASE_ERROR
INTRUDER_DETECTION_ERROR
SPD_TOLER_ERROR
MEM_OPTIMAL_ERROR
74
Explanation
Processor was previously shutdown due to a thermal event
(overheating).
The firmware has detected that a CMOS battery failure occurred.
The firmware has detected that a CMOS Checksum Error occurred.
The firmware has detected that the system date/time has not
been set.
The firmware has detected that the system memory has
decreased.
The system chassis was opened.
SERIAL PRESENCE DETECT (SPD) device data missing or
inconclusive. Properly programmed SPD device data is required
for reliable operation.
The installed amount of memory in Channel A is not equal to the
amount of memory in Channel B. Maximum memory performance
is achieved with equal amounts of memory installed in each
channel.
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