Asus VK222U/S Service Manual page 42

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22" LCD Color Monitor ASUS VK222U/S
8.2.3 Key Board
OSD is unstable or not working
N
Is Key Pad Board connecting normally? Connect Key Pad Board
Y
N
Replace Button Switch
Is Button Switch normally?
Y
N
Replace Key Pad Board
Is Key Pad Board normally?
Y
Check Main Board
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