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Fatal errors emit a beep and may display a "FATAL" message. Fatal errors
indicate severe problems, such as a hardware failure. Fatal errors do not
allow the system to resume. Some of the Fatal error beep codes are listed at
the end of this section.
Message Description Beep
code
CMOS RAM
test failed
A walking bit test of CMOS RAM location 0E (Hex)
- 3F (Hex) failed.
3
DMA
controller
faulty
A sequential read/write of the transfer count and
transfer address registers within the primary and
secondary DMA controllers failed.
4
Faulty DMA
page
registers
A walking bit read/write of the 16 DMA controller
page registers starting at location 80 Hex failed.
0
Faulty
refresh
circuits
A continuous read/write test of port 61h found
that bit 4 (Refresh Detect) failed to toggle within
an allotted amount of time.
1
Interrupt
controller
failed
A sequential read/write of various Interrupt
Controller registers failed.
5
ROM
checksum
incorrect
. A checksum of the ROM BIOS does not match
the byte value at F000:FFFF.
2
RAM error at
location xxxx
RAM error occurred during memory test. None
Fatal Error Beep Codes
NOTE: S = Short, L = Long, P = Pause
Beep Code Beep Sequence Description Recommended
Action
0 S-S-S-P-S-S-L-P
The DMA page registers
are faulty.
Replace system board.
1 S-S-S-P-S-L-S-P
The refresh circuitry is
faulty.
2 S-S-S-P-S-L-L-P
The ROM checksum is
incorrect.
3 S-S-S-P-L-S-S-P
The CMOS RAM test
failed.
4 S-S-S-P-L-S-L-P
The DMA controller is
faulty.
5 S-S-S-P-L-L-S-P
The interrupt controller
failed.
6 S-S-S-P-L-L-L-P
The keyboard controller
failed.
7 S-S-L-P-S-S-S-P
Graphics adapter is
faulty.