Every now and then when im on my computer,it shuts down for no reason instantly..then it restarts..doesnt show no logging off screen.The Monitor just Goes blank. is there any way to know if my power supply is going bad? because i just replaced my current one(Bad Fan) and still am getting the same problem. im assuming it cant be a Power Supply issue cause its brand new! AMD Athlon XP 2800+ OC 2.27 GHZ Nvidia Geforce FX 5200 Audiophile USB Soundboard Gateway2000 Vivitron Max resolution 1600x1024 60 HZ pc3200 512MB ddr sdram Gigabyte GA-7VT600-RZ allied a250atx power supply 40 GB maxtor and 80 GB WDC HP CD-Writer CD12 series and 52x Max samsung cd rom System tempature 40 C CPU Tempature 60 C If you know whats wrong please help!