Hi guys... All of a sudden my PC didn;t want to start this morning. Last night I turned it off ok, and this morning nothing! That is, I've got two lights at the front: one indicates that I've got power and remains lit as long as I use the PC, and the other one blinks when there is HD activity. Well, first light (green) is on but second light not. There is no cooler fan activity, nor I can access setup. It;s as if CPU didn't start up. I've changed power source from a 450W to 550W 15 days ago and used the puter perfectly well. Temperatures are 36C for MoBo, 49C for Graphic card and 58C for CPU (thnx speedfan). Any suggestion what to do? thanks!