LG 42LC4R Manual De Servicio página 25

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.
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Only for training and service purposes
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.
Is the speaker
on it men?
Is the speaker
cable normal?
No
Replace IC600
IC500 operae
nor mall?
IC601 operae
nor mall?
Replace VSC BD
- 25 -
No
Set on speaker
in menu.
Menu?
Yes
No
Check the Speaker
cable
Yes
No
Replace IC500
Normal
Yes
No
Replace IC601
Normal
Yes
LGE Internal Use Only