hello, i have a xbox360 that i got from US, and with that i got a 110v input AC power supply unit. but since i dont have a 110v converter or i dont want to make it a part of the xbox360 system, i am hoping to convert the power supply unit to work with 220v. After opening the PSU, i found two varistors each labeled for 110v, so i removed them and, then plugged into the 220v line and it worked great. But after 15 minutes of playing, my psu got a blown noise and now dead, i opened and looked it again, and found that, the PSU fuse was broken, so i replaced it with high ampere fuse and plugged it in, but it exploded loudly this time? so my question is what we need to do to convert a 110v input psu to 220v input psu. Thanks in advance. best regards.