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2014년 9월 19일에 출시된 이 4.7” 스크린 iPhone은 iPhone 6 Plus의 작은 버전입니다. 모델 번호 A1549, A1586 및 A1589로 식별됩니다.

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Apple Logo Bootloop, no Recovery or DFU, doesn't register any inputs

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).

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possibly a tristar issue

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That could make sense, but the phone still charges, gonna give it a try.

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@Karl Wünsche So the thing about Tristar is, it’s not actually for charging. It’s mostly for USB function, it just gets caught up in the crossfire a lot because it’s what identifies what’s plugged into the lightning port. I’d say tristar is a reasonable start if you’ve already narrowed it down to a board issue.

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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.

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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.

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Bought a new battery and home button, didn't have the front camera connected. Only logic board, battery, screen and home button, aswell as the charging ribbon.

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