Akai LEA-16S02P, Service Manual

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