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Repair information and guides for the Apple iPhone 5s that was announced on September 10, 2013. Model: A1533, A1453, A1457, A1528, A1530, A1518

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phone shuts off while starting up

My iPhone was acting weird today, so I did what I usually do and shut it off for a moment, but as I was turning it back on, it shut itself off again. I've tried turning it on 30+ times and the result is always the same; the white screen with the black apple logo shows for a few seconds, then the screen goes black as it shuts itself off.

Does anyone know if there's a way I can fix this, or how much it might cost to have it fixed at a cellphone store? I currently don't have any interest in getting a new phone and would rather keep this one if I can.

Some background info: my phone is 3 years old, has a non-functional home button, has been dropped enough times that I've had to replace the screen twice, and had around 83% battery life when I turned it off.

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2 Comments:

Has the phone been updated recently? I would rule two things out first, the battery and software. If your information is backed up or you're not worried about losing it I would try restoring through iTunes. I would also test or have a local store test your battery. This is common behavior for both.

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It hasn't been updated since last spring & unfortunately most of my information isn't backed up but it's very important to me.

I'll consider getting the battery tested if nothing has changed in a couple of hours.

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1 Answer

iPhone in boot loop is one of two things- (1) failure of battery (2) failure of main switching voltage viathe Tristar (U2) to switch to main or a short on Main or Battery. if a replacement battery doe's not solve the problem then the Tristar switch will as you explanation gives the cause.

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Jude will be eternally grateful.
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