Power-on diagnostic and boot error messages (continued)
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Enable NMI
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Boot
Error Tone Codes
If power-on diagnostic tests detect an error but cannot display
an error message, the computer sounds an error tone code. The
tone code is a distinct pattern of beeps that identifies the error,
such as one beep-two beeps-one beep. If the error is serious
(fatal) the computer locks up, but if the error is not serious
(non-fatal) you can continue using your computer.
The tables below list the fatal and non-fatal error codes.
Error tone codes for fatal errors
Error tone
code
Description
1-1-3
Real-time clock write/read failure
ROM BIOS checksum failure
1-2-1
Programmable interval timer failure
DMA initialization failure
DMA page register write/read failure
1-3-1 RAM refresh verification failure
64KB RAM chip or data line failure (multi-bit)
1-3-4
First 64KB RAM odd/even logic failure
1-4-1 64KB RAM address line failure
Troubleshooting A-5
Summary of Contents for ExpressStation
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