Skyworth 42E68 - Has video but no audio

N
N
N
OK
OK
Y
Y
N
N
= 0V
> 0V
OK
Has video but no audio
Check if the Volume has set to “0”
or if the it is mute
Done
Check the voltage of “Mute” pin beside
the am
p
lifier IC. It should not be 0V.
Check the mute circuit
if it is OK.
Done
Fix the mute circuit
Upgrade the software
Change the main
IC “U101”
Done
Change the mainboard
Done
Done
Check the audio input line
& the audio in
p
ut circuit.
Done
Service Flow Chart
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