I realize this answer might be a bit late but just wanted to give my solution to the problem. So after searching the web everywher for answers i found out that the problem was probably a blown backlight fuse, but i had no idea if it was supposed to be on the motherboard or on the screen. So i tried searching everywhere on the internet for a picture of the fuse with no luck so i just gave up. Luckily though after a while i went here to see if there was any new answers and I saw that one guy mentioned it was near the screen connection. Now ive finnaly found it i just put a drop of solder on it with my solder Pen so that the two ends gets connected and it actually worked. The best way though is probably to get someone with solder experience to change the fuse because i can imagine that youll easily break something else if you mess upp. Anyway here is the picture of the fuse located on the MOTHERBOARD right above the screen connector. As you can see its really small and is marked with a “v” thats barely visible with your eye:
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