LG LD84A Service Manual page 19

10. No Sound
(1) Symptom
1) LED is blue
2) Screen display but sound is not output.
(2) Check process
All input is no sound?
Yes
Only HDMI is
no Sound?
Yes
Only RF or DTV
is no sound?
* Caution
Before change Main Board,
Check S/W version and White Balance value.
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Only for training and service purposes
No
No
Download the EDID data.
No
Check the Tuner in/Out.
Change Main bord.
Is the speaker
"on" on menu?
Yes
Is the Speaker
cable normal?
Yes
IC100 operate
normally?
Yes
IC1000 operate
normally?
Yes
Replace main board.
S/W download and set White Balance value.
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No
Set on speaker on menu.
No
Check th Speaker cable.
No
Replace IC100.
No
Replace IC1000.
LGE Internal Use Only