Read LG 42LG50FD (CHASSIS:LE81D) Service Manual online
C
2008
- 20 -
4. 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
YES
YES
YES
NO
NO
NO
YES
YES
NO
NO
Is there no sound for all
input(modes)?
input(modes)?
Is there no sound only in
HDMI?
HDMI?
Is the speaker on?
Set on speaker
on in menu.
on in menu.
Is there speaker
cable normal?
cable normal?
Check the
speaker cable.
speaker cable.
Download the
EDID data.
EDID data.
Is there no sound only in
RF?
RF?
Check the Tuner
IN/OUT.
IN/OUT.
Is there no sound only in
AV mode?
AV mode?
Is the output of
CXA2069(IC300)
normal?
CXA2069(IC300)
normal?
Replace the
IC300
IC300
Is there no sound only in
Component, RGB
mode?
Component, RGB
mode?
Is the
MSP4450K(IC500)
operating normal?
MSP4450K(IC500)
operating normal?
Check the signal after
CXA2069 refer to circuit
diagram.
CXA2069 refer to circuit
diagram.
Replace the
IC500
IC500
Is the
NTP3000A(IC501)
operating normal?
NTP3000A(IC501)
operating normal?
Replace the
IC501
IC501
Replace the Main
B/D
B/D
YES
YES
YES
YES
NO
NO
NO
NO
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