Depending on your device and issue, some of these steps may not work.
It is possible, that some of the phones in this thread have a hardware issue with the screen versus a software issue with it not responding to touch.
Please be advised that flashing the ROM or rooting the device will void your warranty.
If none of these steps resolve the issue, it will require service repairs.
@user5nW38iWJAr If none of these steps resolve the issue, it will require service repairs.