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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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iPhone 6 Randomly Stops Working Across Multiple Devices?

Hello,

I buy/sell and fix smart devices and recently have noticed a lot of iPhone 6 suddenly stop working. Even with a new battery and/or charger port the phone will not power up.

Is this happening to anyone else?

Maybe it is to do with the parts or an issue somewhere along the line that I'm not aware of? They definitely use to work.

Any feedback is appreciated, especially about iPhone 6 randomly dying.

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Other than battery issues, which would be normal on 3 year old phones, I don't know of any one thing that would cause them to die. I suspect it has to do with "old age" and regular use/abuse taking it's toll over the years. Perhaps others will chime in with their observations.

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I've got iPhone 4 and 5 models that are still working, it seems strange that it'd be from stress and old age when it should be capable of more than the previous versions?

I have a suspicion Apple are behind it

The 3's, 4's and even the 5's were built like tanks and practically unkillable :>). However, once Apple went to the larger form factors, and especially the 6/6+, they became susceptible to flexing and this causes all kinds of cracked/broken traces around some of the IC's. Think of Touch Disease, Baseband/Searching and now we are seeing the same thing on the Audio IC for the iPhone 7.

The 6 and 6+ are just not as reliable for the long term.

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ZStech,

Beyond a parts problem, one common age-related issue on any iPhone is failure of the motherboard's USB logic integrated circuit codenamed "TriStar" on the iPhone 6 generation.

Imagine your charging system as a group of people trying to walk into a building. The building is the battery. The charger port is the gate to the building. The flow of people is the flow of electricity into the device from any outside power supply. The TriStar IC is the gatekeeper. When the gatekeeper dies, no one can get in.

While TriStar can die due to to age or water damage, another common killer is knockoff Apple lightning cables. Every time fake cables are used to charge a phone, there is risk of damaging TriStar. The fake cables are designed to tell the gatekeeper they are trustworthy, yet they contain no charge potection circuit. Imagine some guy who doesn't belong trys to sneak past the gatekeeper, then punches him in the face while he's not looking. TriStar can only be punched in the face so many times...

If you are experiencing a wave of unexplained dead devices in your shop, especially devices that came in working, but will now not power on with new batteries, you may have a bad supply of chargers. If two shops are buying and testing used phones, the first shop using OEM cables, the second using fake cables, than the second shop will eventually have a higher rate of unexplained DOA's.

I hope my dumb metaphors help.

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That was a great explanation. Thank you. Will the Tristar issue, is it repairable? As for oem parts, is it even possible to buy genuine Apple parts? I thought you couldn't, though for cables I'm sure there is a standard, I'm talking batteries and ports..

Z's,

The TriStar chip can be repaired by most experience shops that offer microsoldering repairs. It is not possibke to buy OEM Apple parts but there are good charger ports out there as well as good batteries. You just need to work to find a reliable supplier. OEM Apple lightning cables are available as this is an accessory and Apple absolutely sells accessories to third parties. However one does not actually need to buy Apple's exact cable. Apple has a standard called Made for IPhone (MFI) which can be used by other cable manufactures. MFI cables have Apple's chips inside and have been certified by Apple. They are just as safe as Apple's own cable.

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