820-3332-B no back light, image yes.

[Dewanbd]

It was working unit and tried to check another screen after that it has no backlight.
F9700= 12.6V on both sides, did a PRAM reset already!
BKLT_EN_L= 0V
BKLT_EN_DIV= 4.3V
PPBUS_SW_BKLT = 12.6V
BKLT_EN=3.1V
D9701 =P1=12.55,P2=55V
PPVOUT_S0_LCDBKLT=55.39V
BKL_SW =1.46V
BKL_FB=25V

 

[2informaticos]

"PPVOUT_S0_LCDBKLT=55.39V"
Open line to LEDs strip; normal voltage is 39V.
Broken trace, bad J9000 connector, or bad LCD assembly (video cable, or display).

 

[Dewanbd]

This is bad LCD assembly, changed this and now it works.Thanks.