Hi Steve, most likely a blown motherboard, these are a problem board and I supply "upmarket" replacments for these. The problem is the capacitors around the processor socket, contact me on compdoctor2005@btinternet.com
Chris, November 2008
Sounds like your PSU is broken; these are quite easy to replace and cost about £25 from any popular on line store (or even PC World).
It could of course be that your computer doesn't have a powerful enough PSU for what it needs, look at getting a 400 watt PSU at the minimum.
