Chosen Solution
This iPhone 6 bootloops, takes no button inputs (power or home). Just bootloops until the battery is empty. I’m quite certain it must be a hardware issue, but how do I figure out what’s causing it? Dead NAND? No Recovery software, iTunes and DFU works. The home button isn’t in the screen frame as that is completely shattered, maybe I’m just $@$* at pressing it outside its mounting position. Any suggestions on what could be wrong, I can microsolder, just need to know what (who would’ve thought).
possibly a tristar issue
Before jumping straight to a board issue make sure it’s not a bad part. But it into a known good housing, or good parts if you have any. At the very least see what it does when only the essentials are connected (something so you can tell it’s booting and something to prompt it to boot. Usually I just leave the dock flex, display (no front camera) and battery connected and see what it does then. Could absolutely be a board issue, but lots of things cause bootloop. After doing tristar, that’s where I would check what the power readings look like on DC power supply (assuming you have one and way to connect it to the battery connector on the iPhone board) and/or start diode moding connectors with a multimeter.
Try it without the front camera ribbon connected and plug in the charger before trying to turn it on. Front Camera can cause boot loops but so can a bad battery. You can buy aftermarket home buttons cheap enough. Only function you’ll lose is fingerprint id.
