![](/images/new-backgrounds/1170981/17098171x1.webp)
2. 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
Connect Key Board
Replace Button Switch
Replace Key Board
36
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
Connect Key Board
Replace Button Switch
Replace Key Board
36