Haier LT26M1C - Key Board Troubleshooting

26”LCD TV Haier LT26M1CA&LT26M1C
36
Key Board
OSD is unstable or not working
Is Key Pad Board connecting normally?
Connect Key Pad Board
Is Button Switch normally?
Replace Button Switch
Y
Is Key Pad Board Normally?
Replace Key Pad Board
Check Main Board
N
N
Y
Y
N