I was browsing the internet on my phone earlier today and it just shut off. Just a forum that I have been to numerous times and I wasn't downloading anything. It just went off. Now I can't get it to turn on. The only time it shows any life is when I plug it in, I get the picture of the battery, but not exactly like the one you get when charging while turned off. It is a similar icon, but no green and it has a little "loading" circle over it. I can't boot it, I can't reset it, nothing. I've done a battery pull, I've done the Volume Up + Home + Power combo and nothing. There was one point where I plugged it in and the charging icon came up. I tried the reset combination and I got the Samsung logo, then it quickly flashed to the Galaxy S3 logo, then very quickly went blank again. When I released, nothing happened and I ended up with the battery + loading circle image. Suggestions? Not rooted, no new apps in the last week or so and it has been running fine. Battery had about 80% left when it happened.