Q: Iphone6, screen and camera stop working, apply pressure upper screen temp fix

A local repair place could not find a problem. They suggested I ask on here. I turn the phone off (but not shut down) when I touch it on the screen is black. The trick I found is to apply pressure on either side of the ear speaker. This usually works, this problem is intermittent and seems to usually occur after I have carried the phone in my pocket (baggy front pocket). No cracks, scratches, the phone looks in good shape. The battery is new. Thanks for your help.