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Acer AT2055 Service Manual page 34

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No sound
Check the source
OK
Check if mute
OK
Check input signal
Check U401
OK
Check U601
OK
Check speaker
NG
Reset source
TV SIF
OK
Check TU201
NG
Change U401
NG
Change U600
NG
Change speaker
Check TV
system
NG
Change TU201
34
NG
Reset TV system

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At2056

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