AOC L27W451 Service Manual page 31

27'' LCD TV Color Monitor AOC L27W451
5.5 No sound
Reset source
Check the source
OK
NG
Check signal filter circuit Replace the filter or inductance
NG
Replace the Earphone jack
Check Earphone jack
SIF signal Check TV system setup
OK
OK
NG
Replace Tuner
Check Tuner
AV, AIR1/AIR2, PC signal
NG
Replace U4
Check Audio decoder MSP3410G U4
OK
NG
Replace U63 or U61
Check U63, U61
OK
NG
Replace U60
Check Amplifier MAX9714 U60
OK
NG
Replace speaker
Check speaker
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