Haier LE49K6500U Service Manual page 46

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-
standby 3.3V,1.5V,1.15V)
• 3.Verify if the Mainchip
AudioAMP ...solder well;
• 4.Verify if the FLASH(U6) has the
right software and right voltage
3.3V;
• 5.Verify if the Y1 (Crystal) has the
right frequency(24MHz)
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(MSD308BEM),
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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.