My phone has a black screen and wont turn on

Hi there!

Is it recognizable in iTunes when you plug it in to your computer?

If you haven’t already, I’d try performing a DFU Restore. A DFU restore will update the OS, and give us a clean slate to further troubleshoot the device.

If that doesn’t help, I would then inspect the digitizer + LCD cables for damage as those are fragile. Definitely be careful if you do end up opening up the device. Once you’ve got it opened, cleaning the contacts gently with isopropyl alcohol/rubbing alcohol/surgical spirits [a q-tip or bristled brush will do the trick].

Otherwise, replacing the LCD screen + digitizer might be the next step.

Hope this helps! Good luck!