>Yes, the PB2400 worked fine with 16MB and booted up and ran just fine >with the 64MB card installed in the previously empty expansion slot but, >after booting, still showed only 16MB total memory. I am running MacOS >8.0 and the first order of business after installing more memory was to >install a newer OS - something I cannot do with the original 16 MB. (OS >8.6 requires 24 MB for installation). > >-tom > >Ralph Mawyer wrote: > > > I'm thinking hardware or install problem. >> >> Running OS 8.6 or 7.6.1...or something in between? >> >> >Greetings: > > > > > >sizes - none were recognized. Does the 2400 need an SO DIMM which is > > >different than the SO DIMMs required by the iBook? (The Mac dealer > > >didn't think so nor did the Apple tech support rep whom they called.) > > > You can't use an iBook SO-DIMM in a 2400. I think that might be the problem... Aqua