AOC i2252VWH - Key Board - OSD No Working Troubleshooting

Service Manual AOCi2252VW
44
Key Board---OSD no working
Check flow chart
For the key board
OSD is unstable or not
working
Is Key Pad Board connecting
normally?
Is Button Switch normally?
Is Key Pad Board normally?
Check Main Board
Connect Key Pad Board
Replace Button Switch
Replace Key Pad Board
OK
NG
NG
NG
OK
OK