Main Board Failure Check - Haier LE40K5000TF Service Manual

9-2. Main board failure check

No picture but have
sound
Check if Blacklight is
shine
Yes
Check if there is +12V at
Pin35 in X21
Yes
Change LVDS wire
No
test if Q46_C（5V）、
Q45_C（5V）is normal
No
Replace Power
Board
Replace the
Q17
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Service Manual
Model No.:
No
Replace Q43 or
Q45
Yes
No
Replace
Blacklight
module