I gotta preface these comments with -> I have _NO_ hands-on experience with PBs 2400. Zero. Nada. None. Zip. However the thought occurs that since larger ram modules almost always mean higher power consumption _AND_ these 'Books seem to be known for rather shaky internal power supply bits, is it possible that adding the larger capacity ram module simply overloaded something power-supply-related? Something that was perhaps marginal anyway? In other words, maybe Stefan didn't do a 'baaaad thing' except upgrade, but rather the poor old 'Book simply got (over)loaded with the final straw(s) which broke its back. IIRC, he added a new HD at the same time, but since newer HDs usually are more frugal with power than older drives, I doubt the new HD would be a suspect in this conjectured PS-bits-failure scenario. just my $.005, Dan K ................................. http://macdan.n3.net/ carracho://dankephoto.dhs.org:9700 hotline://dankephoto.dhs.org:9500 .................................