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26LF15R (CHASSIS:LP81A) - LG TV Service Manual (repair manual). Page 17

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- 17 -
Set on speaker
in menu.
Download the
EDID data.
Check the signal after
IC600 refer to circuit
diagram.
No
No
No
Check the Tuner In/Out.
No
No
Check the Speaker
cable.
No
Replace IC600.
No
Replace IC801.
No
Yes
Yes
All input(mode)
is no sound.
Only HDMI is
no sound.
Is the speaker
cable normal?
Is the speaker
on it menu?
Yes
Only AV/COM2/PC
input is no sound.
Is the output of
IC600 normal?
Yes
Yes
Only RF is no sound.
Yes
Is IC801 operated
normality?
Yes
Replace IC601.
Replace Main B/D.
No
Is IC601 operated
normality?
Yes
6. No Sound
(1) Symptom
1) LED is green
2) Screen display but sound is not output.
(2) Check process
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