Hyundai HLCD-A27W4 Service Manual page 23

27" LCD TV
6. Key Board
OSD is unstable or not working
Is Key Pad Board connecting normally?
Is Button Switch normally?
Is Key Pad Board Normally?
Y
Y
Y
Check Main Board
N
Connect Key Pad Board
N
Replace Button Switch
N
Replace Key Pad Board
23
Hyundai HLCD-A27W4