LG 50PC1RR Service Manual page 25

6. In case of no sound
(1) Symptom
1) LED is white.
2) Screen display but sound is not output.
(2) Check following
Is the SPK cable
normal?
Yes
Is the RF/ AV/
Component/ RGB/
HDMI sound normal?
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No
Is the SPK cable
connected well?
No
Cable inserts well.
No
Does IC400
Operates ?
No
Replace IC400.
Yes
Replace SPK cable.
Yes
Does IC404
Operates ?
No
Replace IC404.
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Yes
Replace
VSC B/D.