Read LG 50PC35-ZC (CHASSIS:PD73A) Service Manual online
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6. In case of no sound
(1) Symptom
1) LED is Green.
2) Screen display appears but there is no sound.
2) Screen display appears but there is no sound.
(2) Procedure check
All input(modes) have
no sound?
Is there no sound only
for HDMI?
No
Yes
Download
the EDID data
Check the signal after
CAX2069 refer to circuit diagram
No
Is there no sound only
for specific?
(except HDMI,DTV,RF)
Check the signal before
CAX2069 refer to circuit diagram
No
YES
YES
Is there no sound only
for RF?
Check the Tuner IN/OUT
No
YES
YES
Is there no sound only
for AV/component/PC?
Is the output of
CXA2069 normal?
No
YES
Is the IC1300
operating normally?
Replace the IC1300
(MSP4450)
No
Is the IC1301
operating normally?
Replace the IC1300
(STA335BW)
No
YES
Replace the VSC B/D
YES
No
Replace the CXA2069
Is the speaker on?
Set speaker on in the
menu.
No
Is the speaker Cable
normal?
Check the Speaker
Cable.
No
Yes
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