Acer AL1722 Service Manual page 44

6.No Audio
Mute and volume setting is ok?
Check power supply of U701 is 12V?
Check input signal of U701is ok?
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NG
OK
NG
OK
NG
OK
Replace U701
NG
Replace speaker
Reset mute and
volume
Check connecting is ok?
NG
Reconnect
Check correspondent
component
44