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Acer Acer –LCD-B223W
24
6. No Sound
Check speaker
No sound
Check C705,C707
Check Pin3,Pin10 of
U701
Check pin7,pin8 of
CN101
Pin13 of U701
Pin1,pin2 of
P701
No sound signal
input
Check
R141,R142,R157,R
158 of IF board
Check 16V Power
supply
U701 Fail
NG
NG
OK
OK
OK
OK
NG
NG
NG
Check
Q701,Q702,Q703,Q
704,R701,R702,
OK