4-15
4. Troubleshooting
4-1-8. No Sound
Symptom Video is normal but there is no sound..-
Major
checkpoints
When the speaker connectors are disconnected or damaged.
When the sound processing part of the Main Board is not functioning.
Speaker defect..
-
-
-
Diagnostics
Check IC2002 or Side-AV.
Change the main PCB ass’y or
side-AV assembly
No
Yes
Lamp(Backlight) Off, no sound.
Yes
Check the sound source and
check the connection of
sound cable?
No
Input a sound signal.
Check the connected cable.
Yes
Check the Speaker?
Replace the Speaker?
Please, Contact Tech support
No
Does the digital data appear at
R2041, R2044~R2046?
No
Check IC5004
Change the main PCB assembly
@
Does the signal appear at R2002 ~
R2007 (PC, AV(Side AV), COMP1/2,
DVI), R5094 ~ R5101 (HDMI)?
Yes
Does the signal appear at
L2001, L2002?
No
Check IC2004
Change the main PCB assembly
#
Yes
!
Caution Make sure to disconnect the power before working on the SMPS / IP Board.
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