[Galaxy S 4 Q&A, Help & Troubleshooting] Deleted member 7459891:
So I don't really know how to describe this best but I'll try to explain it.

So my fathers old S4 just randomly crashed one day and when he tried to boot it back up it just got stuck on the boot screen. And since it was beginning to get old anyways he decided to get an new phone and ended up getting an S8.

His pictures and such were stored on an SD Card so he was able to easily move those files over. But since it refused to boot back up he couldn't get the files of it. And so I decided to try to help him as I'm quite familiar messing with Android and so I flashed TWRP on there to try to get the files of it as I knew that TWRP has support for MTP.

But just one problem, when I had moved about 40% of the files it just randomly crashed again. And now I can't get into the recovery anymore as it just gets stuck on Recovery booting. And most times it wont even react to me holding the power button or plugging it in.

I decided to reflash TWRP and it's still not working and the issue described above is still true.

Any ideas on how to get those files of it? :|

Once I get those files off I will reflash stock and see if everything is working but I wont reflash stock through Odin until the files are on my PC.

Thanks for any help! :)

Tested:

Download mode - Succesfully got into, can flash through Odin. (Edit: 2018-06-29, trying to flash TWRP again, Odin gets stuck on "Initializaltion")

Recovery mode - Used to work but phone crashed during MTP file transfer and now it gets stuck on recovery booting (I have TWRP flashed).

Starting - Stuck on Samsung Galaxy S4 logo, wont even go past to the animated Samsung one.

Safe mode - Not sure if it registred as me going into safe mode, but it did show the animated Samsung logo until it froze after about 10 seconds and a few seconds after that the screen went black, but the notification LED was still on.

Charging - When I first tried charging it after the file transfer failed (It was at 10% according to TWRP during the file transfer and it was only about 7-8 GBs of files and I thought that it should last for long enough while being plugged in) the phone didn't respond in any way, after a while it started to heat up so I knew it was charging. Then after trying some more things I plugged it in again this time it showed the logo it shows right before it starts showing you the charging animation but got stuck there. Then just now when I plugged it back in it got past that and showed the actual animation, but just when I was hoping it had started functioning as it should it just crashed and the screen went black. This is a reocurring problem with basically all parts of the system, the screen goes black and it doesn't vibrate or anything, and after this happens I can't turn it on until I've taken the battery out and let it rest for a few moments.

*Edit: After testing all of these things I realise that the title of this thread is a bit missleading, but I hope you understand.

*Edit 2: In download mode it says that Binary and System are custom even though I haven't modified it more than installing TWRP? Other things it says: KNOX Kernel Lock: 0x0. KNOX Warranty Void: 0x1. CSB-CONFIG-LS0: 0x30. WRITE PROTECTION: Enable. eMMC BURST MODE enabled. (I think this is what might be causing the issue but have no idea on what it is yet)