GS5 not booting properly

[AC Question]

I was using my GS5 when it randomly shut off. I tried rebooting it and it would seem like it's booting normally (sometimes gets past the gs5 logo screen other times it doesn't) but then a white line flashes on the screen for a split second and it vibrates and tries to boot again. I can get it into recovery and I tried wiping all of the data but it still does this. I've done nothing to the phone as far as rooting goes. I did flash a tmobile rom on it months ago because it originally had a metropcs rom and I wanted the lollipop update. That was back in july and the phone has been working perfectly since. It would slow down dramatically when youtube was open along with a bunch of other apps but a reboot would fix that. This is completely out of the blue. I haven't done anything to it. Will reflashing the rom again work or is something physically damaged on my phone?

 

[belodion]

Have you tried a new battery?