The power button is more than just a switch there is some brains built into it (actually a circuit board with a switch and various components on it ) If there is a problem with it your machine will not boot. Also you may want to try removing each RAM stick and booting with just one you could have a bad stick. Brian G4 gigE 1.0 GHz Powerlogix, 1 GB RAM On Apr 25, 2007, at 9:12 AM, Technophobic_Tom at comcast.net wrote: > > > One possibility I've considered is the front panel board (FPB). The > power button requires considerable force but unless there is more > than one contact in there, the switch apparently is working. The > other likely, and more expensive, possibility is the logic/ > motherboard. >