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START
(Video
Is speaker output OK?
YES
Reconnect
the main board
Is speaker output OK?
output OK?
YES
NO
Replace
on the
main
Is speaker output OK?'
YES
NO
Replace main board
Is speaker output OK?
YES
Replace Interface unit
Dose
YES
Is Audio out
adjustment
work with remote
OK?
Is Audio out
OK?
Figure
5
4-6
YES
Go to
Picture Quality
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