820-01041 no backlight but it works in DFU

[ajdoc]

Cant find any liquid damage.
Got image, but no backlight.

Tested clients screen on know good A1990 and it is working fine.
Tested J8500 with EDP METER and all diode mode values are correct.

PPVOUT_S0_LCDBKLT 55V
Tested with known good LCD flex cable and no luck.

When doing "revive device" in DFU I see Apple logo and progress bar but after there is data but no backlight?

Looks like software/firmware?
Any idea?

 

[2informaticos]

Save data (if needed) and try DFU restore.

 

[ajdoc]

There was constant errors during DFU restore.

I ref-lashed SoC ROM U4770 and restore went without any issues - it is working fine again
Thanks