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4 BIOS overview
beep codes and error messages
beep codes and error messages
If a terminal error occurs during POST, the system issues a beep code before
attempting to display the error in the upper left corner of the screen. Beep
codes are useful for identifying the error when the system is unable to display
the error message.
Number of
Beeps
Error Message Description
1 Refresh Failure The memory refresh circuitry on the motherboard is faulty.
2 Parity Error Parity error in the first 64 KB of memory.
3 Base 64KB Memory Failure Memory failure in first 64 KB.
4 Timer Not Operational Memory failure in the first 64 KB of memory, or Timer 1 on
the M/B is not functioning.
5 Processor error The CPU(Central Processing unit) on the M/B generated an
error.
6 Processor Exception
Interrupt Error
The CPU generated an exception interrupt.
7 Processor Exception
Interrupt Error
The CPU generated an exception interrupt.
8 Display Memory Read/ Write
Error
The system video adapter is either missing or its memory is
faulty. This is not a fatal error.
9 ROM Checksum Error The ROM checksum value does not match the value
encoded in the BIOS.
10 CMOS Shutdown Register
Read/ Write Error
The shutdown register for CMOS RAM failed
11 Cache Error/ External Cache
Bad
The external cache is faulty