Samsung stuck at animation logo When I try to turn on my GTS6312 this happens :-

https://drive.google.com/file/d/1b7eBNPs2Oyvfs41c1BwzVSp4uEjCEErs/view?usp=drivesdk

I can not boot into recovery. I flashed the stock ROM but it does not solve my problem.
It just stucks on the samsung constantly glowing animation.
Well, this can be caused by either a hardware failure or simply a software error, also called a soft brick. 

If your hardware is damaged, e.g. the eMMC chip is damaged, there is no much you can do than sending the phone to a repair shop. 

In other hand, the software failure can be ''repaired" by flashing the device with a full firmware, aka 4 files firmware, this cam be found online. Then simply flash it with Odin or any flashing software and your soft brick  should be solved.