You have to download Odin and try different versions. Once you do that find your phone firmware by Googling it. Download the zip file and install it on your desktop into a different folder. Once Odin is downloaded extract the files and open Odin. Click on all four things shown like BL, AP,etc. Find the extracted file for your phone and click on the file and it should have all the information labeled and you just click on the button and add. Of course make sure your phone is shut off first. Hit volume up power and home screen button which will take you to Odin mode. If that doesn't work try volume down power home screen button. Make sure your phone is connected to the PC. Then once all the files are added in Odin and your device shows up on Odin hit start and it will work. This isn't to root this is to bring your phone back to life. I brought my Samsung Galaxy Edge 7 back to life and my Samsung Tab 3 today.