Dell E156FPc - Key Board Troubleshooting

Dell E156FPc
45
9.2.3 Key Board
OK
OK
OSD is unstable or not working
Is Keypad board connecting normally?
Is Button Switch normally?
Is Keypad board normally?
Check main board
Connect Keypad Board
Replace Button Switch
Replace Keypad Board
OK
NG
NG
NG