Philips 190V1SB/93 Service Manual page 42

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42 42
Meridian 1
11.3 Key Board
OSD is unstable or not working
NG
Is Key Pad Board connecting normally? Connect Key Pad Board
OK
NG
Replace Button Switch
Is Button Switch normally?
OK
NG
Replace Key Pad Board
Is Key Pad Board normally?
OK
Check Main Board