It doesn't turn on at all, there are no vibrations when trying to turn it on but the led on the front of the screen does turn on sometimes when I try to turn it on but than it just goes out after a few seconds.
I took it apart and everything seemed fine, I tried reconnecting everything but that didn't work and after that I tried cleaning all of the connectors with rubbing alcohol but that also didn't work.
I also tried turning the phone on with a charger.
What could be the fault?