No Sound - LG 42PC51 Service Manual

14. No Sound

(1) Symptom
1) LED is green.
2) There is a picture but no sound.
(2) Follow check
Is there sound in any
mode?
Yes
Is there no sound
only for HDMI?
Yes
Is there no
sound only AV
/COM2/PC?
Yes
Is there no sound
only for RF?
No
No
Download the EDID data.
No
Is the output
of IC600(R607, R608)
normal?
Yes
Check the signal after IC600.
refer to circuit diagram.
No
Check the Tuner In/Out.
Is the speaker
on?
Is the speaker
cable normal?
No
Replace the
IC600
Is the IC500
operating normal?
Is the IC601
operating normal?
Replace the VSC BD
- 22 -
No
Set speaker on
in the menu.
Yes
No
Check the Speaker
cable
Yes
No
Replace the IC500
Yes
No
Replace the IC601
Yes