Understanding Computer Beep Codes
- 1 beep DRAM refresh failure. There is a problem with the system memory or the motherboard.
- 2 beeps Memory parity error. The parity circuit is not working properly.
- 3 beeps Base 64K RAM failure. There is a problem with the first 64K of system memory.
- 4 beeps System timer not operational. There is a problem with the timer(s) that control functions on the motherboard.
- 5 beeps Processor failure. The system CPU has failed.
- 6 beeps Gate A20/keyboard controller failure. The keyboard IC controller has failed, preventing gate A20 from switching the processor to protect mode.
- 7 beeps Virtual mode exception error.
- 8 beeps Video memory error. The BIOS cannot write to the frame buffer memory on the video card.
- 9 beeps ROM checksum error. The BIOS ROM chip on the motherboard is likely faulty.
- 10 beeps CMOS checksum error. Something on the motherboard is causing an error when trying to interact with the CMOS.
- 11 beeps Bad cache memory. An error in the level 2 cache memory.
- 1 long beep, 2 short Failures in the video system.
- 1 long beep, 3 short A failure has been detected in memory above 64K.
- 1 long beep, 8 short Display test failure.
- Continuous beeping A problem with the memory or video.
