Haier MT5311 Manual page 80

3. 3. Display Trouble (Exceptional screen)
Check if the voltage on pin
No. 1,2,3 of CN18 is OK
Y
If the software If the software
on board is OK
Change Change LCD
software (Screen)
Exceptional screen
Check if the cable is correct
and connected tightly.
Y
N
Check the voltage for
CN3 is panel VCC
Y
Check the
circuit of
Q70(3407)
N
Change Q70
N
Change Voltage for CN3 Ch V lt f CN3
-79-
N
Change the cable
for Panel connector