Read LG 42LH260H (CHASSIS:LA96B) Service Manual online
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8. All Source Audio
Check Mstar I2S Output
R604, R605, R606
Check IC500 Power
*24V, 3.3V, 1.8V.
OK
OK
Make sure you can’t hear any audio.
OK
Check Mstar AUDIO_MASTER_CLK
OK
Check Connector & P600
Check Regulator IC601, IC704
No
Check signal line. Or replace IC100.
No
Replace Mstar(IC100) or Main board.
No
Check Output Signal P600 1, 2, 3, 4 pin.
OK
Replace NTP(Audio AMP) IC500
No
Replace connector if found to be damaged.
No
OK
Check speaker resistance
and connector damage.
Replace speaker.
No
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