820-01041-07 2018 15 inch 55V on backlight output

[MOMOH]

Hello guys

have got an 820-01041-07 2018 15 inch with 55V on backlight output but has no backlight . I have tried with a know good screen , and a different screen cable but no changes , please help

 

[MOMOH]

since I have already tested a video cable and another screen , I will now check continuity on D8410 and j8500