Acer AL1932 Service Manual page 29

3.No Audio
Check Input source
Or Change CN5
Change U5 or U9
No Audio
No
Check Input Signal
CN5 OK ?
OK
Check CN6 to Speaker
OK ?
OK
No
Check U5(Pin6)Volume
& U9 OK ?
OK
Check U5Pin1(Mute)
& Q9 & U9 OK ?
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No
Change Speaker or
CN6(Cable)
No
Change U5 or Q9 or U9