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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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Panic reset when charged and screen locked.

Hello,

I recently suffered from Touch Disease and I reflowed the 2 touch ICs. All went well, or so I thought.

Now when I charge the phone at night, it reboots once the phone is 100% charged. In the analytics, there is a panic log generated before the phone reboots with the panicString: "AppleBCMWLANBusInterfacePCIe::reset() \" \"Failed to enable port (I\/O timeout)..."

If I disable Wifi, then the rebooting doesn't occur. Something is happening when the phone is charged and connected to wifi that causes the phone to reboot. iCloud backup?

I've tried reflowing the wifi IC, thinking that perhaps I screwed up when reflowing the touch ICs, but that has made no difference.

Any ideas? I am thinking of replacing the touch IC and wifi IC with new, but I have a nagging suspicion that the problem is elsewhere. Maybe the CPU?

Any ideas gratefully received. :)

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So, looking at the schematics, it looks like the wifi chip talks directly to the CPU via PCIe interface. I hope this doesn't mean that I damaged the CPU when I reflowed the Touch IC. I would be surprised because I didn't apply heat for long. Less then to remove the chip, for example.

I have ordered the Touch ICs and the Wifi chip. I will replace them and if that doesn't fix it then it's probably the CPU and I'll probably give up at that point.

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Reflowing IC's is never a long-term solution. Worse still is trying to reflow IC's that have underfill, such as the WiFi IC. When you apply heat, enough heat to make the solder flow, the solder balls expand. When that same IC is locked into place with underfill, the expanding solder balls build up pressure underneath the IC. You will get bridging or worse yet, the solder may blow out from underneath. If you see lot's of tiny solder balls around underfilled IC's, that's a sign you applied way too much heat.

The other risk with "reflowing" is that unless you have the proper tools (hot air station vs heat gun), you can also flood the rest of the circuit board with excess heat, causing the same issues as above on surrounding IC's. In your case, the CPU is opposite the Touch IC's so it is possible you caused some issues there.

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Thanks for that. That's useful insight. I will check for tiny solder balls when I remove the wifi IC.

I did use a hot air rework station and I took as much care as I could do mask off the other components. Hopefully I haven't heated it up too much.

I will let you know how I get on with the new components.

Thanks again. :)

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Any idea why this only happens when the phone is 100% charged? It has been about 5 days now that the phone hasn't been charged and it hasn't rebooted once. I know that as soon as it is charged again it will reboot (and continue rebooting every few hours while the charger is attached.) It's a head scratcher.

I thought maybe iCloud backup was causing it, but I forced a backup and it completed with no problems.

Does the phone index files or re-organise memory or something when it's charged and idle for a certain amount of time?

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The problem might actually be in your hardware itself, not the components of your phone, if possible could you try to reset your phone and see if that'd help?

Though before you do, check if there aren't any suspicious apps that could do this, since I never had my iPhone reboot once it reached 100%

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Thanks, but I've already reset and restored it a couple of times. It made no difference unfortunately. I'm pretty sure it's a hardware fault.

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Yea, you could either go to the Apple store and have them check for you, just to be sure, or you can just replace the parts.

Though I would suggest going to the AS anyways just so they can confirm it is the hardware, not something else

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