I tried to do this and I have hard bricked my phone.
I first tried doing this about about a month ago and wasn't successful getting root. I thought, "Oh well, I tired" and went about my business. I was getting messages on boot about knox and sys.... not working but I was still able to use my phone.
Eventually, I got tired of that and thought "I'll do a factory reset and everything will be fine." Tried that and was still getting messages about know and sysscope (?) not working.
Eventually, I started getting more messages about other things crashing like google play, etc.
I tried another factory reset the other day and was still getting error messages. I tried putting it in download mode a few times (volume, home, power button) and it worked and I was getting to try to flash/root it again and then it wouldn't boot at all.
Now it is completely hard bricked. It doesn't turn on at all. Tried several cords/batteries/remove sd/remove sim, etc. No signs of life.
I know I am an idiot and shouldn't have tried this. I have rooted phones before with success but this one killed me.
The only thing I see to do is to do this: http://forum.xda-developers.com/show....php?t=2690033
Which seems difficult for Macgyver let alone my Macgruber-like skills.
Any other options that I can do myself?