LG 60PZ550 Service Manual page 58

All Source Audio Trouble Shooting
Make sure you can't hear any audio
Y
Check BCM I2S Output
R305~R307
Y
Check Power
16V(C325), 3.3V(L302)
Y
Check IC300 Status
/PDN(#19), /Reset(#25) is High?
Y
Check Signal (PWM)
L300 L301
Y
Check Connector
P300
Y
Check speaker for damage.
Great Company Great People
N
Replace IC501.
N
Check 16V(C325), 3.3V(L302)
N
Replace IC300
N
Replace L300 L301
N
Replace P300
N
Replace the Speaker
25/37