hey i had 3.52 m33-4 software and i attempted to downgrade it to 1.50 using this tutorial http://youtube.com/watch?v=GZfVWwYGnmA
i followed it exactly and it seemed like it was working until it came time for it to restart after it was installed. when i hit the power on the screen only stays black and nothing else happens.
can anyone tell me whats wrong and if its possible to fix