AOC L27W451 Service Manual page 32

27'' LCD TV Color Monitor AOC L27W451
5.6 Key Board
OSD is unstable or not working
N
Connect Key Pad Board
Is Key Pad Board connecting normally?
Y
N
Replace Button Switch
Is Button Switch normally?
Y
N
Replace Key Pad Board
Is Key Pad Board Normally?
Y
Check Main Board
32