Troubleshooting 2-7
COMPAQ CONFIDENTIAL - NEED TO KNOW REQUIRED
Writer: David Calvert Saved by: The Integrity Group Saved date: 10/26/00 11:45 AM
Part Number: 128679-006 File name: Ch02
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.
Table 2-2
Fatal Error Messages
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
*Beep codes are defined in Table 2-3.
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