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Display Trouble
white screen
White screen
Check the power supply for
panel
N
Y
Check the switch signal for Q8/AO3401's
Check the output signal of U14
G-pole voltage (3.3V~0V or 5V~0)
Y
N
N
Y
Change the LCD panel
Check the circuit of U14 pins
Change U14
Check CN17 or change
Or the cable to panel
Or if the I/O of U14 is damage
Q8
Display Trouble
black screen
Black screen
The voltage of BLON Signal in
5V ? (on CN3)
Y
N
Is inverter power is normal?
N
Y
Check the circuit from BLON pin to U14
Check if inverter power
or U14 I/O damage (pin 67)
Check and repair power supply
Is damage
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