Haier LE55Q6500U Service Manual page 29

Trouble Shooting
No picture but have
sound
Check if Blacklight is
shine
Yes
Check if there is +12V at
Pin50 in CNW8AD
Yes
Change LVDS wire
No test if CN2-3/4pin（3.3V）
is normal
No
Replace Power
Board
Replace the
UM1
No
Replace
QD3/QD5
Yes
No
Replace
Blacklight
module