Chosen Solution

I just replaced the battery of my iPhone 6. The battery is working fine and I’ve done this procedure multiple times. However, the touchscreen is unresponsive. Swiping on the homescreen or starting apps works pretty normal. The problem mostly occurs when typing something. Then it just starts typing out of itself, mostly the letter ‘b’. I opened it up again and reattached the frontscreen connectors. Then I thought it was solved but then it became impossible to type again. It seems like it occurs sometimes more than others. Any idea on what this could be? The screen was working perfectly fine beforehand. Any specific methods for attaching the connectors or cleaning them?

Had the same problem. The last screen connector you take out, or the first one that you put back, was a bit bended and didn’t make good contact with board. You need to feel the click when pressing down. Hope this helps someone