Troubleshooting guide

Table 2-2. Fatal Error Messages
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Message Description Beep Code
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CMOS RAM test failed A walking bit test of CMOS RAM
location 0E (Hex) - 3F (Hex) failed. 3
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DMA controller faulty A sequential read/write of the
transfer count and transfer address
registers within the primary and
secondary DMA controllers failed. 4
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Faulty DMA page
registers A walking bit read/write of the 16 DMA
controller page registers starting at
location 80 Hex failed. 0
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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
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Interrupt controller
failed A sequential read/write of various
Interrupt Controller registers failed. 5
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ROM checksum incorrect A checksum of the ROM BIOS does not
match the byte value at F000:FFFF. 2
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RAM error at location
xxxx RAM error occurred during memory test. None
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Parity error at
unknown location Parity error occurred. None
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