LG 32LF7300 - Page 28

Copyright © 2009 LG Electronics. Inc. All right reserved. -28- LGE Internal Use Only
Only for training and service purposes
5. In case of no sound
(1) Symptom
1) LED is blue.
2) Screen display but sound is not output
(2) Check follow
All input(mode)
is no sound?
No
Is VCC “ +20V”
Normal?(JP1 : 1pin)
Yes
No
Re
p
lace Power Board.
Yes
Is the speaker Cable
normal?
No
Check the Speaker
Cable
Only HDMI is
no sound?
Download
the EDID data.
No
No
Only DTV is
no sound?
No
Yes
Check the Tuner In/Out
Yes
Only AV/component/PC
input is no sound?
No
Check the in
p
ut source.
Yes
Re
p
lace Main Board.