LG 50PC1D Service Manual page 21

3. 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 connected
the Flat cable correctly?
Yes
No
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
Cable inserts well.
Yes
Is the MSP4410K Is the NSP6241
(IC404) normal? (IC403) normal?
No
Replace IC404. Replace IC403.
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Yes
Replace SPK cable.
Yes
Is the TAS5122
(IC405) normal?
No
Replace IC405.
Yes
Is the FLI8532
(IC404) normal?
No
No
Replace IC800.
Yes
Replace
VSC B/D.