A1707 820-00928 no backlight

[hgoncalves]

Hi.

I habe an A1707 820-00928 without backlight. It shows a very dark image, but I can see the Apple logo.

External image is OK.

I've already replaced U8400, but with same result.

Can you help?

 

[2informaticos]

What is the backlight output voltage?
Check diode mode to ground, if no voltage.

Did you try known good display assembly?

 

[hgoncalves]

Hi.

PPVOUT_S0_LCDBKLT = 58V

I've already tried known good display.

 

[2informaticos]

Looks like broken trace somewhere; no contact with LED strips.