H a n n S t a r D i s p l a y C o r p .
Document Title
HW191A _XY _HSM
Page No.
44
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Document No.
Revision
07/08/03
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11.2.3 Key Board
OSD is unstable or not working
Is Key Pad Board connecting normally?
Connect Key Pad Board
Is Button Switch normally?
Replace Button Switch
Y
N
N
Is Key Pad Board normally?
Replace Key Pad Board
Y
N
Y
Check Main Board
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