820-4924 no image and no backlight

[yobad]

820-4942 water damaged
no image no backlight
there is image on the external screen
the water damage was in the backside of J8300, on U5620, U8330 ...
I found a broken trace on J8300:3 I did a jumper.
PP5VR3V3_SW_LCD_UF 0v
I replaced u8300.
with no result

 

[2informaticos]

Do you have 3V at pin 5 of J8300?

There should still be traces, solders, or some corroded resistors.
Image should appear before backlight.

 

[yobad]

done, I found 3 broken traces. thanks