Haier LE55Q6500U Service Manual page 23

Trouble Shooting
• Mainboard not work
• 1. Check the "power board " in
main-board whether has 12V
and 5V 5vsb output .
• 2.Verify if the DC/DC
convertors have the right output
(3.3V,1.15V,1.5V)
• 3.Verify if the
Mainchip(MSD6488),
AudioAMP...solder well;
• 4.Verify if the NANDFLASH(U2)
has the right software and work
well;
• 5.Verify if the Y1(Crystal) has
the right frequency
Panel not work

1. Check the LED Back light "set‐up IC "

output and input are working .
2.Verify if the Mainboard output the

right On/Off signal to power board;
3.Verify if the Mainboard output the

LVDS singal to panel T‐con board
4.Verify if the software is the right

version of this model.
5.Change the LVDS wire to check if it's

broken.