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Phoenix BIOS 4.0 Beep Codes

  • 1 One short beep before boot
  • 1-2 Search for option ROMs. One long, two short beeps on checksum failure
  • 1-2-2-3 BIOS ROM checksum
  • 1-3-1-1 Test DRAM refresh
  • 1-3-1-3 Test 8742 Keyboard Controller
  • 1-3-4-1 RAM failure on address line xxxx*
  • 1-3-4-3 RAM failure on data bits xxxx* of low byte of memory bus
  • 2-1-2-3 Check ROM copyright notice
  • 2-2-3-1 Test for unexpected interrupts
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