When you disconnect and recconnect a screen it is very important to disconnect the battery when doing so if you didnt disconnect the battery you may have corrupted the os by causing a short Attempt to Restore on Itunes and it should go back to normal from my experience. Steve CPR Cellphone Repair.
Hi Taylor, The screens that you purchased may have the wrong resistance put on them causing the home button to get hot ive experienced this issue before i switched my screen supplier and the problem didnt persist. I highly reccommend trying a new supplier Stephen T. CPR Cellphone Repair.
Sim Reader could be possibly bad try opening the phone and cleaning the Gold Contacts with a little electrical grade rubbing alcohol make sure to have the device off when doing so let try and reassemble the device. If this doesnt fix the issue A new Sim reader on the main board would be nessasary.
Hi this is a common issue known as Touch IC failure it is repaired by soldering on a new touch IC it is micro soldering and does require board level solder experience Best of Luck Steve Thormodson Mobile Device Technician CPR (Cell Phone Repair)