Haier LE40K5000TF - Main Board Failure Check

No picture but have
sound
Check if there is +12V at
Pin35 in X21
No
Replace
the
Q17
Ye
s
Check if Blacklight is
shine
Yes
No
test if Q46_C（5V）、
Q45_C（5V）is normal
Change LV
DS wire
No
Replace Q43 or
Q45
Replace Power
Board
Ye
s
Replace
Blacklight
module
No
Service Manual
Model No.:
9-2. Main board failure check
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