Iiyama PLE1902S Service Manual page 38

19" LCD Color Monitor
8.2.3 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
NG
Replace Button Switch
NG
Replace Keypad Board
38
Iiyama PLE1902S
Connect Keypad Board