so back to the problem that I have encountered: my S5 cannot power off properly after flashing G900F. I have an ATT S5 and I used towelroot to root, install Safestrap and did all the backup, setup a new rom kind of stuff. After that, I flash G900F to my phone (with all those wipe done correctly). My phone works perfectly fine but when I try to turn off my phone, it will do all the work but keeps in a black screen with the two button lights on. When I tried to turn on my phone then, it would not do so, so I believe it hangs at that black screen.
Did anyone encounter this before and know a way out? Every help is appreciated and sorry again if this post is in the wrong area.