Half of screen is Blue/Black
I was followed the guide to fixing the power button. Everything went well until i turned it on. I can only see half the screen the other half is black. I have tried tightening the screws and reconnecting the screen connections with no luck. The touch features are still fully functional.
Looks like you have either a bad video connection, or an ESD issue while opening and handling the the internals of the phone. If all you did was change a power button the only possible causes would be your LCD/Digitizer connectors either are not on all the way, damaged, or something got pinched or zapped with electrostatic. Were you grounded and did you take the logic board out?