Phone Won't Boot - I've tried a few things but now I'm stuck

[AC Question]

I have a SHG-I747. It gets stuck on the AT&T logo screen when I restart. I tried booting in safe mode - didn't work. I tried a factory rest - didn't work.

I tried Kies (both versions) but it said my device didn't support initializing.

Then I tried usin Odin, but I think the file I was using was an earlier version than my phone is currently running so that's why it didn't work.

My phone is on 4.4.2 and it does go to the download screen and the recovery screen.

Any ideas what else I can try?

Thanks