820-00840 backlight without image. External is ok.

[BCN_Techs]

No water damage. Internal screen has backlight but no image, external is ok. Already checked new display, flex (lcd to board) without result. Any idea?

 

[BCN_Techs]

Nothing?

 

[2informaticos]

Any history available?

Check diode mode on all EDP data lines; compare with good working board.