Chosen Solution

Hi, so I know this is a commonly asked question, but I can’t find anything like my situation. I got a replacement 6s screen a while ago, installed it fine, didn’t rip any cables or anything, the only thing I noticed was that the home button was really loose and would shift around a lot. I reconnected everything correctly, but I didn’t snap in the clips holding the screen down because I wanted to make sure it worked. The LCD issues were fixed, but the home button was very finicky and would only work about half the time or when I held it down for a few seconds. After trying it for a while it just stopped responding at all. I disconnected the battery, digitizer cables, etc. to make sure everything was good, and it seemed totally normal. Now I don’t know what to do. Please help me out, thanks. I never had Touch ID enabled so I don’t know if that works.

Might be a home button gasket loose, or the home button cable might be loose, you can buy a gasket here: iPhone 6s and 6s Plus Home Button Gasket Without replacing the gasket, the home button will feel loose and that might have ripped the cable. Open it up and check the cable, if it is the gasket, you can replace it easily.

To clarify is the screen right now not turning on? If yes try shining a flashlight to the screen to see if there is a dim apple logo appearing when you reseat the battery connector and then the phone on. Note that if the screen connectors were touched while the battery was still plugged in this can cause the backlight circuit to blow. If that is the case the phone will need to be taken to a local reputable phone repair shop that does board repairs to fix the backlight circuit.