LG 42PC5R Service Manual page 21

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14. No Sound
(1) Symptom
1) LED is green.
2) Screen display but sound is not output.
(2) Check following
All input(mode)
is no sound.
Yes
Only HDMI is
no sound.
Yes
Only AV
/COM2/PC input is
no sound.
Yes
Only RF is no sound.
No
No
Download the EDID data.
No
Is the output
of IC600(R607, R608)
normal?
Yes
Check the signal after
IC600 refer to circuit
diagrma.
No
Check the Tuner In/Out.
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Digitized in Heiloo the Netherlands
Is the speaker
on it men?
Yes
Is the speaker
cable normal?
Yes
No
Replace IC600
IC500 operae
nor mall?
Yes
IC601 operae
nor mall?
Yes
Replace VSC BD
4/17/2018
No
Set on speaker
in menu.
No
Check the Speaker
cable
No
Replace IC500
No
Replace IC601
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