Screen not working or iTunes

The screen went black randomly although backlight was still working, I thought this was a screen problem so I replaced the screen with a spare one I had which then the same problem occurred, soft resets did not work. I put the phone into recovery mode and connected to iTunes and restored but during the process the phone goes onto the Apple logo screen with a bar and a few seconds later an error comes up on iTunes (unknown error occurred(9)) and the phone goes back to the screen not working. Someone help please.