Greetings Jean-Luc ( + )!( + ) What happens if you hold the power button down? What the power button does is latch up a relay to power up the Platform. See this Macosxhints form. http://forums.macosxhints.com/archive/index.php/t-33637.html Also take a look at this ZDnet page. http://news.zdnet.com/2100-9595_22-111977.html Cheers - Harry - ø?ºº?ø,¸¸,ø?ºº?ø,¸¸,ø?ºº?ø,¸¸,ø?º?ø On Mar 20, 2009, at 1:30 PM, Jean-Luc Brousseau wrote: > Hello, > I have a G4 MDD 1,42 MHZ DP that refuses to power up. > When I push the Start button, the led lights for half a second and > goes off. > Nothing starts. > I have asked my usual Apple service center to check if this is a > power supply or a main board problem and he told me that he has no > parts to check this. He needs at least another power supply or > another main board, but he has none. > > Does anyone knows how I can check this in order to be sure what is > the defective part? > > If I could at least know this, I would be able to sell the working > parts on eBay or elsewhere. > > Best regards > > Jean-Luc Brousseau > brousseaujeanluc at mac.com > > > > > > > _______________________________________________ > G4 mailing list > G4 at listserver.themacintoshguy.com > http://listserver.themacintoshguy.com/mailman/listinfo/g4