[Wlug] My SUN ULTRA ONE died!

Help!! My SUN ULTRA ONE has stopped altogether. It had turned itself off a month or so ago. When I hit the ON switch the little green light came on for a moment then went off. I figured a fan or something of that nature had died. Today I got ready to work on it. Now nothing happens. Absolutely nothing when I push the ON switch. I have a running spare ULTRA ONE for parts. I suppose I have to start by swapping the power supplies, but I was hoping you guys would tell me about a fuse - or something. Ken Jones (Fitchburg) E-mail message checked by Spyware Doctor (7.0.0.514) Database version: 6.14790 http://www.pctools.com/en/spyware-doctor-antivirus/