Sixth iteration of Apple iPhone, announced on September 12, 2012. Repair of this device is similar to the previous models, requiring screwdrivers and prying tools. Available as GSM or CDMA / 16, 32, or 64 GB / Black or White.

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How to see a motherboard problem


I've just changed my battery in my iphone 5 but after that, the new battery unload really fast.

So then l return to the place where l bought it and the saler said me it is a problem with the motherboard.

But now l would like to know how to recognise a motherboard because l feel like the saler didn't put a new battery but one that have been already used...

Thank you


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it definitely sounds like a problem on the motherboard with a chip called Tristar or U2. The problem is that this chip is draining more power than what you can put into your phone. Therefore replacing the battery doesn't address the issue at hand.

This is definitely a replaceable part, and is a very common problem. go to a repair shop that does micro soldering and they should be able to help you out.

If you want to give it a go yourself ill point you in the right direction on what to do, but it requires a lot of expensive equipment and even more time learning how to do it.

So I wouldn't recommend doing it if you haven't done it before.

A motherboard is basically a PCB/Circuit board that is inside your phone with thousands of microscopic sized components soldered to it. There is no way to see a motherboard problem, only ways to diagnose a motherboard problem. Kinda the same way that you can't see DNA but you can diagnose problems with it.

My biggest issue is why the repair shop you first went to didn't see the problem in the first place (As it only takes 60 seconds to test for) and refer you else where. We get customers coming in all the time asking for battery replacements and only about 15% actually need them, the rest have the U2 Problem mentioned above.

I hope that answers all your questions.


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Hi. I have the same issue. My phone also feels like it heats up. Also, if I press the power button and leave it on the table for about 3 minutes 30 seconds, it shuts down completely (and needs to be restarted). Could you guide me in the right direction because hte store I went to replaced the battery and couldn't fix the issue either? (iphone 5s in my case)


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