AOC 212Va - Keypad Board Troubleshooting

22" LCD Color Monitor AOC 212Va
39
8.2.3 Keypad Board
OSD is unstable or not working
Is Key Pad Board connecting normally?
Connect Key Pad Board
Is Button Switch normally?
Replace Button Switch
Y
N
N
Is Key Pad Board normally?
Replace Key Pad Board
Y
N
Y
Check Main Board