I built my system three weeks ago and it was running fine for 2 weeks. A week ago it paused at the boot screen when it does the memory check (running XP btw) but a reset sorted it and it carried on fine. A week later the same thing happens and another reset sorts it. Now it just won't go past that screen and I'm at a loss to know why. Now it won't even turn on, the power supply is alright because I have tested it in another computer. Anyone with any suggestions?