Default [Q] Droid Razr Bootloop!?

Hello Guys, i have a Motorola Droid Razr xt910 and it has a very strange problem, Bootloop! its not the usual problem i am not a noob so Ive tried all thats known factory reset and flashing fastboot via rsdlite i did that too but the problem comes after that. After i flash stock 4.1.2 eu firmware it boots the first time(firstboot) but then after that if i power it off and start it again it will again get stuck in bootloop. every time. tried different firmware everything. it was running on 2.3 asia f/w and i updated it to 4.1.2 after which the problem occurred!? help!!??