POST Beep Codes
Probable Causes
Error
Beep Codes
Defective system board.
Memory refresh failure.
1
Faulty DIMM or defective system
board.
Error occurred in first 64 KB of main
memory.
2
Faulty DIMM.
Read or write error occurred in first
64 KB of main memory.
3
Defective system board.
Timer on system board malfunctioned.
4
Defective microprocesor.
Microprocessor error.
5
Defective system board.
Gate A20 failure.
6
Defective microprocessor.
Microprocessor-execption interrupt
error.
7
Missing or faulty video adapter.
Video memory read/write error.
8
Corrupted system BIOS program or
defective system BIOS chip.
ROM checksum value does not match value
encoded in system BIOS.
9
Defective system board.
NVRAM shutdown register read/write
error.
10
Defective microprocessor or cache card.
Cache memory error.
11
Faulty video adapter.
Video adapter failure.
12
Loose video cable connection or
defective video cable.
Faulty video
adapter.
No monitor connected.
13
14
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