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3.Power supply for LED drive
Check if LED
output
short/open
Remove
Correct
short/open
the LED
status
cable
IR indicator light
up but backlight slake
Y
Check if LED output cable
is connect correction
Check PWM_DIM&PWM_REF&
BL_ON Control signal
check is part of
Y
the brightness is
in dim status
Y
N
N
Y
Y
check is all of
brightness/check
the brightness is
if Sampling
in dim status
resistor is right
N
Check if UB801 PIN 1
voltage is about 12V
Y
N
Check QB801/DB801
damage or not
Y
Change
Change UB801
QB801/DB801
Increase
Check
Main
board
function
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