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iOS Crash Auto Restart

iPhone or iPad restart itself?

When your iPhone or iPad reboots itself without your permission, it’s considered an iOS crashed. Doesn’t matter a few minutes or a few hours. 
The problem is always from the hardware. But if you’re insist think it’s a software problem, you can just restore it by using PC’s iTunes or reset all the data under Setting – General – Reset. But you gonna know that iOS is very stable and it won’t have this kind of bug or virus causing your device to reboot itself. Apple is a billionaire company and they are not an idiot. People love Apple because of its software stability.

Unless you somehow touched the hardware and it starts to give this problem, then it might be the software is corrupted when the hardware changed. 

This article is talking about how the technician analyzes the problem.  

Panic File Report

Every time the iOS crashed, it will create a report file inside the iOS. Apple called it a panic file. 
You can access it under “Setting – Privacy – Analytics & Improvements – Analytics Data”. 
The file name is “Panic-Full-year-month-date-time.ips”

NOTE: Not panic-base. It’s panic-full

Panic File Analysis

NOTE: If you unplug the battery while you’re testing, the date and time will be messed up. So you need to remember what’s the date when it gets crashed. 

Reading the panic report file

The report file is not designed for end-users or outsiders to understand it. This article is just to show you how normally we analyze the error and how it can help us where to begin the troubleshoot and diagnosis. 
It’s designed for their engineer-level programmers to read it. Even the Apple technicians don’t know what to do with it. Because they are a greed company that only asks you to pay for a whole device replacement. They don’t repair at all. This is why we exist. 

We are the third-party repair that always fixes anything that they won’t.
So the third-party repair community like us will always found a way. So we found that the Panic file report is actually can be useful to a professional like us. 

Below is a few examples to show you how we use them to help to troubleshoot the actual problem faster. 

Panic-full missing sensor

Panic-full Missing sensor

The above report is obviously said that one of the sensors in the iPhone is not working. There is no successful check-in from it. 
There are more than 10 sensors on the iPhone. Since it didn’t specifically say which sensor is that, then we have to put the motherboard into our full working housing to test it. 
If the problem is gone, then it means one of the flex is the problem. Such as charger port, power button flex. So we have to troubleshoot the flex one by one. 
If the problem is still there, then it means the motherboard can’t detect the sensor. A full diagnosis on the motherboard is required. The FPC connectors are our first step.

Panic-full mic problem

This one is obvious. It’s saying missing sensor, but this time it does clearly show the mic2 is the problem.
mic2 is means microphone #2. 
iPhone inside has multiple microphones. So we replace the microphone #2 to test again. If okay then it’s just the mic2 flex that is the problem.

If the problem still exists, then the connection between the motherboard and mic2 has a problem. The first step is to inspect the FPC connector too.

Panic-full big problem

This is considered a big problem. When it mentioned kernel, it’s mean CPU. 
CPU has a problem.
But I know some smartass end users will start to ask can we replace the CPU?

The reasons of CPU failure can be hundreds. It can be a power failure, voltage unstable, unstable connection from the board, and blah blah blah. Only a professional like us can check what’s going on and fix it accordingly. We don’t blindly reball the CPU to create a mess that we shouldn’t.

Sometimes even a simple flex can cause the CPU malfunction. 

Another way to analyze the panic file

There are many other ways to analyze the panic file. Because the repair community is everywhere from around the world. 
Countless technicians gather the experience to build a database for this thing to our job easier.
Some of them are the programmers and providing their analysis for a small fee. 

Want to know more? I only share this with my students. Please check “Panic” lesson in semester one online course. 

If you are having such of problem....

Unplugging every flex won’t help you, because the iPhone X and newer models will still get the same problem if the part is missing
So you need to find a professional like us that owns all the parts to test it. Especially a full-set of housing that contains every original flex and part

If you plan to do it yourself, high chance that you will be wasting your money.

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