AOC 201S Service Manual page 37

20" LCD Color Monitor
9.2.3 Key Board
OSD is unstable or not working
Is Keypad board connecting normally?
Is Button Switch normally?
Is Keypad board normally?
OK
OK
OK
Check main board
NG
Connect Keypad Board
NG
Replace Button Switch
NG
Replace Keypad Board
37
AOC 201S