I've been using the Asus A7V333 for more than 4 months now without any problem. Today, while using it, it suddenly turned-off by itself and now I can't power it up again. I'm not sure whether it's a power supply problem or the cpu/motherboard was fried. I'm using XP1800+ cpu with no-overclocking + 256mb pc2700. The power supply is a 400W psu. Anyone has experienced this before???