LG 49UF6700 - Digital; Analog TV No Sound

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Only for training and service purposes
10. Digital / Analog TV No sound
Check RF cable & signal
OK
Check Tuner power L3701, L3704 : 3.3V
NG
Replace L3701, L3704
OK
Check Tuner I2C R3716, R3717, R3738, R3739
Replace R3716, R3717, R3738, R3739
Follow procedure
“9. All source audio”
OK
Check IF signal TU3700 6,7 pin
NG
Replace Tuner
OK
NG
Replace Tuner or IC101 or Main Board
NG