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26 About Your System
System Beep Codes
If an error that cannot be reported on the screen occurs during POST, the system may emit a series of beeps
that identifies the problem.
NOTE: If the system boots without a keyboard, mouse, or monitor attached, the system does not issue beep codes
related to those peripherals.
If a beep code is emitted, write down the series of beeps and then look it up in Table 1-7. If you are unable to
resolve the problem by looking up the meaning of the beep code, use system diagnostics to identify the
possible cause. If you are still unable to resolve the problem, see "Getting Help" on page 121.
Table 1-7. System Beep Codes
Code Cause Corrective Action
1-1-2 CPU register test failure See "Troubleshooting the Microprocessor" on
page 109.
1-1-3 CMOS write/read failure; faulty
system board
Faulty system board. See "Getting Help" on
page 121.
1-1-4 BIOS error Reflash the BIOS.
1-2-1 Programmable interval-timer failure;
faulty system board
Faulty system board. See "Getting Help" on
page 121.
1-2-2 DMA initialization failure See "Troubleshooting System Memory" on
page 100.
1-2-3 DMA page register write/read failure
1-3-1 Main-memory refresh verification
failure
1-3-2 No memory installed
1-3-3 Chip or data line failure in the first
64 KB of main memory
1-3-4 Odd/even logic failure in the first
64 KB of main memory
1-4-1 Address line failure in the first 64 KB
of main memory
1-4-2 Parity failure in the first 64 KB of
main memory
1-4-3 Fail-safe timer test failure
1-4-4 Software NMI port test failure
2-1-1
through
2-4-4
Bit failure in the first 64 KB of main
memory