LG 50PB65 Service Manual page 28

6. In case of no sound
(1) Symptom
1) LED is Green.
2) Screen display appears but there is no sound.
(2) Procedure check
All input(modes) have
no sound?
YES
Is there no sound only
for HDMI?
YES
Is there no sound only
for RF?
YES
Is there no sound only
for AV/component/PC?
Yes
Is there no sound only
for specific?
(except HDMI,DTV,RF)
No
No
Download
the EDID data
No
Check the Tuner IN/OUT
No
Is the output of
CXA2069 normal?
YES
Check the signal after
CAX2069 refer to circuit diagram
No
Check the signal before
CAX2069 refer to circuit diagram
Is the speaker on?
Is the speaker Cable
normal?
No
Replace the CXA2069
Is the IC1300
operating normally?
Is the IC1301
operating normally?
Replace the VSC B/D
- 28 -
No
Set speaker on in the
YES
No
Check the Speaker
Yes
No
Replace the IC1300
YES
No
Replace the IC1300
YES
menu.
Cable.
(MSP4450)
(STA335BW)