NEC Express 120Mf, Service Manual

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4-8 Troubleshooting
Error Beep Codes
Beep Error Cause Troubleshooting
1-2-2-3 ROM checksum error FMEM checksum error Replace MotherBoard
1-3-1-1 DRAM refresh test error Memory refresh error Replace DIMM
1-3-1-3 Keyboard controller error Keyboard controller
error Replace MotherBoard
1-3-3-1 DIMM can not be detected Memory not installed or
cannot write. Check DIMM
Mounting or Replace
DIMM
1-3-3-1 Memory check error ↑ ↑
1-3-4-3 DRAM test low byte error Memory address signal
fault (low side) Replace MotherBoard
or DIMM
2-2-3-1 Unjust exception test error Unjust exception Replace MotherBoard
or CPU
1-2 Video configuration fails Expansion VGA BIOS
memory
Deployment failure
Replace MotherBoard
or Graphic board
1-2 OPTION ROM Checksum failure Expansion ROM BIOS
memory
Deployment failure
Replace MotherBoard
or Option board