Haier LE42U6500TF Service Manual page 49

Trouble Shooting
• Mainboard not work
•
1. check if there is +12V/+5V output
on the power board
•
2.Verify if the DC/DC convertors have
the right output (5V,3.3V,1.5V,1.15V)
•
3.Verify if the Mainchip(MSD308BEM),
AudioAMP...solder
•
4.Verify if the FLASH(U6) has the right
software and work well;
•
5.Verify if the Y1(Crystal) has the right
frequency
well;
- 59 -
Panel not work

1. check if the voltage input and

output of voltage boost IC of the
backlight is OK.
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.