Display Troubleshooting - Haier 48E2500 Service Manual

7 Display Trouble
8 Display Trouble
Check if the control circuit
between BL_ON and
BL_EN is normal ?
N
Repair the circuit
white screen
Check the circuit of QM1
Change U1(MSD3393)
black screen
Check if BL_ON state is normal
N
Y
Change U1(MSD3393)
White screen
Check if the voltage of panel power
supply is normal(depend on panel)
N
N
Black screen
Y
Repair the power supply
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Service Manual
Model No.: 48E2500
Y
Check output signal
from U1(MSD3393)
Y
Change the panel
or the cable to panel
Check if the control circuit
between ADJ and
PWM/ADJ is normal ?
N
Y
Check if the power supply
for inverter is normal?
Check the inverter board