Haier LT22M1CWA Service Manual page 33

22"LCD TV Haier LT22M1CWA&LT22M1CW
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
33