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Understanding Computer Beep Codes

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.

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