820-02100 No backlight PPVOUT_LUXE from logic board

[repMacFixit]

Hello

Have another one here with backlight issue. I've confirmed the display works with another board and video outputs via HDMI as well. Found corrosion on UP800, replaced along with RP880 and RP833 as they were open. Still not getting backlight. Replaced UP800 again just incase with the same outcome.

i'm getting the below voltage reading with the display connected. And you can see a faint image in the display

BL_PWR_EN_R - 1.22V
PP1V2_AWAKE -1.23V
PPBUS_AON_LUXE - 12v
LUXE_UG1 - 0V
LUXE_BT_C1 - 4.8V
LUXE_BT_C2 - 4.8V

 

[2informaticos]

Compare diode mode readings in the backlight area with good board.
If not available, use refference table:

OpenBoardData Project