Chosen Solution
Replaced a broken digitizer on my iPhone 6 plus, following this guide iPhone 6 Plus LCD and Digitizer Replacement Used the phone with no problems a whole day, then the touch stopped working. I’ve reconnected all the connector cables, worked almost a whole new day, then stopped working again. If i turn the device off, and on again the touch works for like 5 minutes before it stops working again. Any Ideas on how this problem can be resolved?
Sounds like you may have bought a faulty LCD, I would get it exchanged, that should solve it.
Touch input all jacked up after multiple screen replacement attempts ^try this maybe. It’s working for me.