32PG6000-ZA (CHASSIS:PD81A) - LG TV Service Manual (repair manual). Page 20

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1) LED is Green.
2) Screen display but sound is not output.

All input(mode) is no

sound?

Only HDMI is No

Sound?

Yes

Download

the EDID data

No

No

YES

Only RF is no sound?

Check the Tuner IN/OUT

TV_L/R_OUT( R356)

No

Yes

IC601(Audio AMP) operates Normal?
1.Check 1.8V, 3.3V, 16V input Voltage (L607, IC601 Pin8, IC601 Pin32)
2.Check the  IIC communication (SDA/SCL : R645, R643)
3.Check the Audio Signal is normal.(SPK_L/R : L603, L604, L606, L610)

Replace the Audio AMP IC

(IC601).

No

No

YES

Replace the VSC Board

Is the speaker On it menu?

1. Menu > Audio > TV Speaker ON/OFF

Set on speaker in menu.
(TV Speaker OFF ? ON)

No

Is the speaker Cable normal?
1. Isn’t  damage in the Speaker Cable?
2. Is the Speaker cable connect well form VSC B/D to Speaker.

Change or Reconnect the

Speaker Cable. 

Yes

Only RF is no sound?

Replace the VSC B/D

Yes

Yes

Check the Input Sound IN/OUT
AV1(SC1_LIN : R1140, SC1_RIN : R1134)
AV1(SC2_LIN : R1146, SC2_RIN : R1145)
AV3(SIDE_LIN : R1306, SIDE_RIN: R1307 )
PC(PC_LIN: R631, PC_RIN : R630)
Component (COMP_LIN : R1178, COMP_RIN: R1179)

No