No Sound - LG 26LC2R Service Manual

5. No Sound

(1) Symptom
1) Front LED is Green
2) The Set display a screen, but a sound doesn't output
(2) Check process
1) Speaker part
Are Speaker Cables Good?
No
Exchange the cable
2) Main board part
No
Is sound at HDMI
Good?
Is sound at
Scart1/2 (or No
Component2)RGB,
or Side AV Good?
Is sound at RF, AV,
No
or Component1
Good?
Yes
Are Speaker Cables
connect normally?
No
Insert the cable exactly
Yes
Is EDID download
good?
No
Download EDID
data once more.
Are good some
elements (C, R, L, Yes
or Diode) at Sound
path?
No
If it dead or short,
exchange this
elements
Are good some
elements (C, R, L,
or Diode) at Sound
path?
No
If it dead or short,
exchange this
elements
Yes
Are Speaker units good?
Is IC401 good?
(AD9381)
No
Exchange IC401
Yes
Is IC800 good?
(Switching IC)
No
Exchange IC800
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Yes
Is IC601 good?
(VCT-P)
No
Exchange IC601
Is IC801 good?
(Amplifier)
No
Exchange IC801