Haier LE39B7000TF - Panel Failure Symptoms and Causes

you connect.
Service Manual
Model No.: LE39B7000TF
No sound but have picture
Verify if the speakers are
broken
No
Yes
Change the speakers
Verify if the main board has the
right input ,according to the source
TV/COMPONENT/AV/VGA/HDMI etc.
Yes
Verify if UA1 has the right
output
Yes
Check CN17 input is right
No
No
Check the corresponding audio
input circuit you connect.
Verify if U31 has the right power in
No
Change UA1
Still having problems
Change Mainboard
40