• IBM Desktop BIOS Beep Codes
  • IBM Thinkpad BIOS Beep Codes

     

    IBM Desktop BIOS Beep Codes:

    Beeps

    Error Message

    Description

    1 short Normal POST System is booting properly
    2 short Initialization error Error code is displayed
    1 long, 1 short System board error  
    1 long, 2 short Video adapter error  
    1 long, 3 short EGA/VGA adapter error  
    3 long 3270 keyboard adapter error  
    Continuous Power supply error Replace the power supply
    999s Power supply error Replace the power supply
    No beep Power supply Replace the power supply

    IBM Thinkpad BIOS Beep Codes:

    Beeps/Error

    Description

    Continuous beeping System board failure
    One beep; Unreadable, blank or flashing LCD LCD connector problem; LCD backlight inverter failure; video adapter faulty; LCD assembly faulty; System board failure; power supply failure
    One beep; Message "Unable to access boot source" Boot device failure; system board failure
    One long, two short beeps System board failure; Video adapter problem; LCD assembly failure
    One long, four short beeps Low battery voltage
    One beep every second Low battery voltage
    Two short beeps with error codes POST error message
    Two short beeps System board failure