TCL LCD-27VSE - Key Board Fault Diagnosis Details

27’’ LCD TV Color Monitor TCL LCD-27VSE
27
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
N
N
Is Key Pad Board Normally?
Replace Key Pad Board
Y
N
Y
Check Main Board