The Apple iPhone 5s was announced on September 10, 2013. Repair of this device is similar to the previous models, and requires screwdrivers and prying tools. Available as GSM or CDMA / 16, 32, or 64 GB / Silver, Gold, and Space Gray.

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Power issues - phone won't power on

Hi all,

I hope you can offer some insight into a recently purchased iPhone 5s I bought to repair.

The phone shows no sign of life when charging cable is plugged in ie no backlight, no Apple logo or charging icon is displayed. Also, there is no vibrate when it is given power via a mains charger.

I've opened the phone which appears to have been opened before. It shows no signs of water damage.

Using voltmeter, battery shows approx 0.2 volts when disconnected from logic board, clearly no enough to power on. I've also verified that no current is drawn when plugged in via an apple usb mains charger.

Question is - if I disconnect the battery from the logic board, and plug the lightening cable into the phone should it start? Just to clarify, can an iPhone 5s start without a battery plugged to the logic board?

The fact it's been opened before leads me to believe it's not just simple a case of replacing the battery or charge port since I imagine this would have been the 1st port of call (and a simple fix).

Any thoughts would be appreciated.

Cheers,

Jason.

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Hi Jason,

Plugging in the charger whilst there is no battery in, usually pops up with the Apple logo but then goes off and comes back on with the Apple logo like a loop.

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Hi PhoneOpsPlus,

Ok, that makes sense, but not hopeful for this phone.

Should I also be able to measure the voltage at the battery power socket when it's removed?

What voltage should I see? 3.3v?

Sounds like it could be a logic board problem, would you agree?

Many thanks for your response.

Jason.

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It definitely appears to be a logic board problem, that's why I tend not to buy faulty phones off sites off eBay etc. you can get lucky sometimes and it will be a simple fix, but most of them are other technicians who have tried to fix it themselves to no avail.

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When the battery is disconnected and the phone is plugged in to a mains charger should there be a voltage across the socket the battery connects into?

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Jason will be eternally grateful.
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