NEC 5800, 120Mf manual Error Beep Codes, Troubleshooting

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