Unfortunately there are not a whole lot of Atrix 2 users on the site. Your best bet is to ask on XDA. Just make sure you search first.
Motorola Atrix 2 - XDA Forums
Off hand it sounds like you are going to need a factory cable to try to wake it up again. It will be good to have the exact file that you flash handy so that whoever helps you knows what happened with the phone. Good luck! I hope it works out.![]()