Trouble Shooting - No Audio (All Audio Source) - LG 42LE5400 Service Manual

11. Trouble shooting - No Audio (all audio source)

Check the TV Speaker Menu
(Menu -> Sound -> TV Speaker)
On
Check AMP IC(IC8801) Power
*20V, 3.3V, 1.8V.
ok
Check AUDIO_MASTER_CLK
R8828
ok
Check AMP I2C Line
R8804, R8805
ok
Check Mstar I2S Output
R8801, R8802, R8803
ok
Check Output Signal P8800
1, 2, 3, 4 pin.
ok
Check Connector & P8800
ok
Check speaker resistance
and connector damage.
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Only for training and service purposes
Off
Toggle the Menu
No
Check Regulator IC8800
No
Replace BCM( IC900) or Main Board.
No
Check signal line.
Or replace BCM( IC900)
No
Check signal line.
Or replace BCM( IC900)
No
Replace Audio AMP IC(IC8801)
No Replace connector
if found to be damaged.
No
Replace speaker.
LGE Internal Use Only