I have a powermac G4 733 (quicksilver) model m8493 with motherboard 820-1342-B (2001) in which the power light comes on but then a red light at D55 on the logic board flashes and the machine shuts down. I've changed the battery, ram, video card and the hard disk. It looks like the motherboard?Any ideas - or does someone have a quicksilver motherboard?BTW - I Can't listen to the bootstrap chimes as there is no speaker!best -gord --- MUGLO information at <http://www.freewebs.com/muglo> Manage list subscription options at <//www.freelists.org/list/muglo>