A Error Messages and Indicators
Desktop Board D955XBK reports POST errors in two ways:
•
By sounding a beep code
•
By displaying an error message on the monitor
BIOS Beep Codes
The BIOS beep codes are listed in Table 11. The BIOS also issues a beep code (one long tone
followed by two short tones) during POST if the video configuration fails (a faulty video card or no
card installed) or if an external ROM module does not properly checksum to zero.
Table 11.
Beep Codes
Beep
Description
3
No memory
Siren
CPU overheat (on reboot)
BIOS Error Messages
When a recoverable error occurs during the POST, the BIOS displays an error message describing
the problem.
Table 12.
BIOS Error Messages
Error Message
PROCESSOR_THERMAL_TRIP_ERROR
MULTI_BIT_ECC_ERROR
SINGLE_BIT_ECC_ERROR
CMOS_BATTERY_ERROR
CMOS_CHECKSUM_ERROR
CMOS_TIMER_ERROR
MEMORY_SIZE_DECREASE_ERROR
INTRUDER_DETECTION_ERROR
SPD_TOLER_ERROR
MEM_OPTIMAL_ERROR
Explanation
CPU was previously shutdown due to a thermal event
(overheating).
The firmware has detected that a Multi-Bit ECC Error occurred.
The firmware has detected that a Single-Bit ECC Error occurred.
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. DDR2 533 MHz memory assumed at
slowest timings.
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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