I got exactly same problem, My x2 chip worked fine for whole year. but now I got the same problem, I try to use installer 2.6, but after reboot, i only show MS dash. cant not boot from evoxdash, so i just try to rename xboxdash to something elae and rename evoxdash to xboxdash, it works fine,and i try to turn off for few minutes,it still work. but after 5 hours power off, and I turn it on, the same problem occurred. just stop at the x2 logo.