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