Chosen Solution
I was given this iPhone 6 from a colleague of mine and he had the screen replaced by Apple, but it only has a black LED when the power is on. When I try to factory reset it the Apple logo only shows up then. I need help to try and fix it!
I think @sfsrepair is right. That could work. Or Dr. Fone. I’ve heard good things about that. Or connect to iTunes and attempt an update. If you do a restore, it will wipe the phone, and you’ll need to have your buddy put in his email/password and then he/she can erase the phone, then you can use it
