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A Error Messages and Indicators
Desktop Board DP965LT reports POST errors in two ways:
• By sounding a beep code
• By displaying an error message on the monitor
BIOS Beep Codes
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 13 lists the BIOS
codes.
Table 13. Beep Codes
Beep Description
3 No memory
Siren Processor overheat (on reboot)
BIOS Error Messages
When a recoverable error occurs during the POST, the BIOS displays an error message
describing the problem.
Table 14 gives an explanation of the BIOS error messages.
Table 14. BIOS Error Messages
Error Message Explanation
PROCESSOR_THERMAL_TRIP_ERROR Processor was previously shutdown due to a thermal event
(overheating).
MULTI_BIT_ECC_ERROR The firmware has detected that a Multi-Bit ECC Error occurred.
SINGLE_BIT_ECC_ERROR The firmware has detected that a Single-Bit ECC Error occurred.
CMOS_BATTERY_ERROR The firmware has detected that a CMOS battery failure occurred.
CMOS_CHECKSUM_ERROR The firmware has detected that a CMOS Checksum Error occurred.
CMOS_TIMER_ERROR The firmware has detected that the system date/time has not
been set.
MEMORY_SIZE_DECREASE_ERROR The firmware has detected that the system memory has
decreased.
INTRUDER_DETECTION_ERROR The system chassis was opened.
SPD_TOLER_ERROR 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.
MEM_OPTIMAL_ERROR 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.