Haier LE40D3281 - Mainboard Failure Check

Service Manual
Model No.: LE40D3281
9-3. Mainboard Failure Check
Nopicturebuthavesound
Checkthepoweroutput
No
ChangethePowerBoard
Yes
ChecktheCN2(BLO)
Backlighton/off
Yes
No
There’ssomethingwrong
withFRC
VerifyiftheDC/DC
convertorcanoutputthe
rightVoltage,
No
Changethecorresponding
DC/DC
QB3output5V
Yes
No
Verifyif
QM1 
output

Change
theQM1
Yes
Stillhaving
problems
ChangePanel
ChangeLVDSwire
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