Default Phone is Bricked, Super Hard Brick.

hello, im new here and sorry if im doing anything wrong.
My problem is that my G2 SUDDENLY, i mean, suddenly just stopped working. I put it for charging overnight, woke up in the morning and turned on the screen to see the time and it turned on for like 2-3 seconds then blank. I shrugged it off and woke up later to my phone dead.
I tried charging it and everything and it wont respond. i didnt flash anything because my bootloader was locked but my phone was rooted. I asked on another forum and they pointed towards SDS (sudden death syndrome).
Im gonna go to the retailer and lets see if i can get a replacement. (sorry im kinda noobish)