2-24 Setup and Operation
Beep Codes are listed in the table that follows.
Table 2-5 Beep Codes
Number Of
Beeps
Error
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 64 KB Memory
Failure
Memory failure in the first
64 KB.
4
Timer Not Operational
Memory failure in the first
64 KB of memory or Timer 1 on
the motherboard is not
functioning.
5
Processor Error
The CPU on the motherboard
generated an error.
6
8042 – Gate A20 Failure
The keyboard controller (8042)
may be bad. The BIOS cannot
switch to protected mode.
7
Processor Exception
Interrupt Error
The CPU generated an
exception interrupt.
8
Display Memory
Read/Write Error
The system 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.
