Read LG 50PX950N-ZA / 50PX960-ZA (CHASSIS:PD02D) Service Manual online
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All Source Audio Trouble Shooting
Make sure you can’t hear any audio
Check Signal (PWM)
L700 L701
Replace L700 L701
Y
N
Check Power
16V(C721), 3.3V(L702)
Check 16V(C721), 3.3V(L702)
Y
N
Check Connector
P703
Check BCM I2S Output
IC700 #20,21,22
Y
Replace IC700.
N
Check speaker for damage.
Y
Check IC700 Status
/PDN(#19), /Reset(#25) is High?
Replace IC700
N
Replace P703
N
Replace the Speaker
N
Y
Y
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