If it doesn't work in another machine I would just try to RMA it. Just explain to them exactly what happened. In the past I've had good experiences with MSI support. In the past they even mailed me a replacement BIOS chip free of charge (even shipping!) and when that failed they where more than happy to RMA the board that I bricked and I told them how it happened.
So unless they've become more strict and their support has gone down the drain, they should accomodate you, but there is something you should take away from this.
Do not flash a GPU unless you're completely out of options and no one can offer you a better suggestion.
I can't emphasize this enough. I see threads regularly about someone who bricked their GPU because they flashed it. You're better off just calling support and not flashing it if something is wrong with it. If there is a problem with the BIOS, I bet you most vendors will take the card for RMA. You don't need to do it yourself, and even with this all said, I still think MSI will help you out if it's still under warranty.
Last edited by Aquinus; Mar 4, 2013 at 09:34 PM.