Q:
A: could be any piece of hardware, try seeing the code it shows you when it blue screens, 0x000006B ex. Take a look at your motherboard and see if any of the capacitors are buldged or have corrosion on them. If they do then your mobo is shot. If not, then try running a memtest86. Try taking your video card out and replacing it with another one or running off the regular video. Multiple things could be wrong with it.