Read LG 26LC41 / 26LC42 / 26LC4R (CHASSIS:LP78A) Service Manual online
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14. No Sound
(1) Symptom
1) LED is green.
2) There is a picture but no sound.
2) There is a picture but no sound.
(2) Follow check
Is there
sound in any
mode?
Is the speaker on?
Yes
Yes
Is the speaker
cable normal?
cable normal?
Yes
Yes
Is there
no sound only for
HDMI?
Yes
Is there no
sound only AV
/COM2/PC?
Is the
output of IC600
(R607, R608)
normal?
Yes
Is there
no sound only for
RF?
No
No
No
No
Download the EDID data.
Set speaker on
in the menu.
in the menu.
No
Replace the
IC600.
No
Check the Speaker
cable.
cable.
No
Is the IC500
operating normal?
Replace the IC500.
No
Yes
Is the IC601
operating normal?
Replace the IC601.
Replace the VSC BD.
Yes
Check the signal after IC600.
Refer to circuit diagram.
Refer to circuit diagram.
Check the Tuner In/Out.
No
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