[Q] Is my phoned hard-bricked?

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http://forum.xda-developers.com – So I went on rooting AT&T SG S III using Toolkit 5.0 from XDA. After running Odin rooting, my phone was unresponsive to the next step. I then unplugged the phone and redid. So now - cannot go to downloading mode; when hold Volume Up+Home+Power, it vibrates, shows Samsung icon and then black-out - hold power button and it'll be the same - computer doesn't recognize the phone whatsoever So was phone hardbicked? Is there anything I can try? Had the phone not even a week and now this happened :( (HowTos)