Beep Code Meaning
- 1-1-2 Faulty CPU/motherboard.
- 1-1-3 Faulty motherboard/CMOS read-write failure.
- 1-1-4 Faulty BIOS/BIOS ROM checksum error.
- 1-2-1 System timer not operational. There is a problem with the timer(s) that control functions on the motherboard.
- 1-2-3 Faulty motherboard/DMA failure.
- 1-3-1 Memory refresh failure.
- 1-3-4 Failure in the first 64K of memory.
- 1-4-1 Address line failure.
- 1-4-2 Parity RAM failure.
- 1-4-3 Timer failure.
- 1-4-4 NMI port failure.
- 2-_-_ Any combination of beeps after 2 indicates a failure in the first 64K of memory.
- 3-1-1 Master DMA failure.
- 3-1-2 Slave DMA failure.
- 3-1-4 Interrupt controller failure.
- 3-2-4 Keyboard controller failure.
- 3-3-2 CMOS error.
- 3-3-4 Video card failure.
- 3-4-1 Video card failure.
- 4-2-1 Timer failure.
- 4-2-2 CMOS shutdown failure.
- 4-2-3 Gate A20 failure.
- 4-2-4 Unexpected interrupt in protected mode.
- 4-3-1 RAM test failure.
- 4-3-3 Timer failure.
- 4-3-4 Time of day clock failure.
- 4-4-1 Serial port failure.
- 4-4-2 Parallel port failure.
- 4-4-3 Math coprocessor.
