LG LN61A Manual De Servicio página 18

3. No Sound
(1) Symptom
1) Front LED is Green
2) The Set display a screen, but a sound doesnt output
(2) Check follow
1) Speaker part
Yes
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
Yes
elements (C, R, L,
or Diode) at Sound
path?
No
If it dead or short,
exchange this
elements
Are good some
Yes
elements (C, R, L,
or Diode) at Sound
path?
No
If it dead or short,
exchange this
elements
Are Speaker units
good?
No
Exchange the
Speaker unit
Is IC401 good?
(AD9381)
No
Exchange IC401
Yes
Is IC800 good?
(Switching IC)
No
Exchange IC800
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Yes Is IC801 good?
Is IC601 good?
(VCT-P)
No
Exchange IC601
(Amplifier)
No
Exchange IC801