Haier LT42M1CF Service Manual page 32

42"LCD TV Haier LT42M1CFA&LT42M1CF
Key Board
OSD is unstable or not working
N
Is Key Pad Board connecting normally?
Connect Key Pad Board
Y
N
Is Button Switch normally?
Replace Button Switch
Y
N
Replace Key Pad Board
Is Key Pad Board Normally?
Y
Check Main Board
32