Chosen Solution
I installed a new screen a while back from ifixit and it worked perfectly. Then, out of the nowhere, it stops responding to any and all touch. I called ifixit and they sent out a replacement, which worked for about an hour then it stopped. I have restored to make sure it wasn’t software related but no improvement. I have found that if I put pressure on the phone by slightly bending it, then the touch comes back. Is this touch disease? I have absolutely no grey bar. Thanks
It is starting to sound like Touch Disease. The iPhone 6 does suffer it less than the 6Plus but it still happens. The twisting of the housing is what gives it away. As for the grey bars, they aren’t always present, at least initially. But first, check your connections as @cam2363 suggests and see if it has anything to do with the housing. Ideally, you need a known-good screen (new does not mean known-good) to completely isolate that variable. However that is not always practical for an end-user. Two screens from iFixit should suffice at this stage. Touch Disease is not a DIY fix so your best bet would be to find a reputable micro-soldering repair shop for a proper troubleshooting and repair.
