How to tell if your LG G4 will bootloop / Possible ways to prevent or repair.

This post will help inform you of whether or not your LG G4 is prone to the boot loop issue and how you can take some preventative steps to stop it from happening. As well as some methods to recover data if you have already boot looped.

Firstly, in order to tell if you have a potential bootloop LG G4 device, go to your keypad and type: *#546368#*815#. If you have another variant of the G4, just repalce 815 with your version number. (I have the H815 variant.)

This will bring up the following menu, click on the SVC Menu option.

Then click on the version information menu.

Here you will see your hardware version number. Mine is 1.0. The updated motherboards without the boot loop issue is version 1.1. If you have 1.0, you are most likely to have the boot loop issue coming at you sooner or later.

However, this is not the only determinant, if you look up your IMEI number found behind your phone's battery, you can type it into this website: http://www.imeipro.info/check_lg.html and you will be able to see the manufactured date of the device. Typically, devices manufactured before October 2015, will have this issue, however it was reported that some devices manufactured later on still had the issues. 

(Some people are lucky enough to never have the boot loop issue to date, even with the details mentioned above.)

The issue is due to a faulty chip on the motherboard, which contains the A57 CPU. It has been known to overheat and cause connection issues to the motherboard and hence cause the boot loop issue. 

Potential Fixes

There is a YouTuber called 'Youber.cz' who posted this video: https://www.youtube.com/watch?v=lbJXwPmbXFc informing users that they can root their devices on lollipop, and disable certain cores of their device if they have been in a boot loop. This will give the user time to recover some of their data. 

He also shows us how you can re-enable some other CPU cores on the device and disable the BAD A57 Cores so you can still use your device, just at a lower speed. This has known to work for a lot of users, however some still have not gotten success with this. 

Another temporary fix may be to take the motherboard out of the phone and bake it in the oven for about 3 minutes on 400 degrees Fahrenheit to help re-solder the joints of the CPU and allow you more time to get the device to power on and recover important data. 

If all else fails, you may just have to purchase another motherboard from online, that's if you want to spend the money to do so, or if you're lucky enough, LG will fix it for you under warranty. 

Prevention

Referring to the same YouTuber as mentioned above, if you are worried you may have this issue sooner or later based on your findings of your hardware version and/or your manufacture date, and you have no warranty from LG, I believe that following his tutorials on rooting your device and disabling some of the cores, may save you the time of waiting for the problem to occur. (This will void your warranty.)

You can simply root your device and download 'any' application that can disable certain cores on your device, and simply disable the two big cores and you should be in the clear from having the boot loop problem happening to you. 

You will need to be extra careful not to brick or damage your device inoperable by following any rooting instructions incorrectly, or by trying any of the techniques mentioned above in this tutorial, as I would take no responsibility if anything happens to your device, but I've tried all options already with some success. 

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If you are lucky enough to still own the device and no boot loop problems have happened to you yet, you may be one of the lucky ones that have gotten away with no such issues. The LG G4 device is an amazing phone however, and I hope that no other devices would have these issues in the future.