Hello mwathen, Tuesday, July 09, 2002, 7:41:13 PM, you wrote: m> I am building a computer from scratch. I have connected my power supply to m> my motherboard and, after turning it on, have gotten no response. I m> unhooked my hard drives, cd rom, sound and graphics cards, and memory. The m> only thing connected is my motherboard, power supply, and processor (athalon m> 2100+) with heatsink. The voltage is correct (115 in USA), the outlet m> works, and the cords work. Any suggestions? m> thanks, m> ~Michael Wathen Try to measure the voltages from the 5 pin slots which supply power to IDE devices. Black- GROUND and Red - 5V. In the general case when you turn on power the power source cooler begin to work. The simpliest crush in power source is burned "preserving" devices (two for each ~115V wire) made of keramic or glass with thin whire inside. -- Best regards, Yakymakha Visit our website regularly for FAQs, articles, how-to's, tech tips and much more http://freepctech.com