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Compaq Video BIOS Post Codes

  • 01 - Reserved
  • 00 - Entry into video ROM
  • 01 - Test alternate adapters
  • 02 - Perform vertical sync tests
  • 03 - Perform horizontal sync tests
  • 04 - Perform static system tests
  • 05 - Perform bug tests
  • 06 - Peform configuration tests
  • 07 - Perform alternate ROM tests
  • 08 - Run color gun off tests
  • 09 - Run color gun on tests
  • 0A - Test video memory
  • 0B - Check that adapter board is present
  • 10 - Error - Illegal configuration
  • 20 - Error - No vertical sync present
  • 21 - Error - Vertical sync out of range
  • 30 - Error - No horizontal sync present
  • 40 - Error - Color register failure
  • 50 - Error - Slot type conflict failure
  • 51 - Error - Video memory conflict error
  • 52 - Error - ROM conflict error
  • 60 - Error - Red DAC stuck low
  • 61 - Error - Green DAC stuck low
  • 62 - Error - Blue DAC stuck low
  • 63 - Error - DAC stuck high
  • 64 - Error - Red DAC fault
  • 65 - Error - Green DAC fault
  • 66 - Error - Blue DAC fault
  • 70 - Error - Bad alternate ROM version
  • 80 - Error - Color gun stuck on
  • 90 - Error - Color gun stuck off
  • A0 - Error - Video memory failure
  • F0 - Error - Equipment failure
  • 00 - Video POST complete
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