LG 50PC1DA Service Manual page 21

3. In case of no sound
(1) Symptom
1) LED is white.
2) Screen display appears but there is no sound.
(2) Follow Check
Is the SPK cable
normal?
Yes
Is the Flat cable
connected?
Yes
Is the RF/ AV/
Component/ RGB/
HDMI sound normal?
No
Is the SPK cable
connected?
No
Re-insert the cable
No
Re-insert the cable
No Yes
Is the MSP4410K
(IC404) normal?
No
Replace the IC404.
Yes
Replace the SPK cable.
Yes
Is the NSP2100
(IC403) normal?
No
Replace the IC403. Replace the IC405.
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Yes
Is the TAS5122
(IC405) normal? (IC404) normal?
No
Replace the IC800.
Is the FLI8532
No
Yes
Replace the
VSC B/D.