4. Key Board
OSD is unstable or not working
NG
Is Key Pad Board connecting normally?
Y
NG
Is Button Switch normally?
Y
NG
Is Key Pad Board normally?
Y
Check Main Board
33
Connect Key Board
Replace Button Switch
Replace Key Board
OSD is unstable or not working
NG
Is Key Pad Board connecting normally?
Y
NG
Is Button Switch normally?
Y
NG
Is Key Pad Board normally?
Y
Check Main Board
33
Connect Key Board
Replace Button Switch
Replace Key Board
