It's
very unlikely to be a problem with your video card, but I usually try to troubleshoot backwards from the obvious to the less obvious, with careful regard for what's easiest
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The video card and the PCI slot
can be hurt by a surge, and it's an easy check, and it gives you something to do (and ammunition if you end up talking to a tech).
So, for me, I'd pull those first, and see if booting with motherboard video gives you a different result. If not, then I'd disconnect the monitor altogether. Then try the RAM in each slot. Then pull the RAM altogether. It's a pain in the butt, but if the tech you talk to (if you have to talk to a tech) may very well ask you to do all of these things before they'll admit there's a problem with your motherboard.
One final thing. Don't assume that what you did (unplugging,plugging) had anything to do with your problem. Maybe it did, and maybe it didn't. I have seen PC components fail for many reasons, often between a simple off/on operation, and new (or relatively new) components are far more likely to do that than an older component. It's the nature of the beast. If you do end up having to talk to a tech before they issue an RMA, let him/her/it lead the troubleshooting. Don't give them an easy out by suggesting
you broke it. Don't lie, but don't cut the troubleshooting short