I am trying to understand where the issue is with my G4 Quicksilver. I have a 1.47GhZ Fastmac processor and machine runs 10.4 (latest updates etc). If I boot up normally I get maybe 3-5 seconds of Apple logo then a short black square then crash. If I boot up in safe mode it starts ok, but then the system profiler sees 512mb of RAM in one slot, even when other slots have RAM in them. I suppose it's possible I have 4 bad sticks of other RAM but I'm a little confused by it all. If I run Applejack it crashes before I can get to run it, and memtest didn't respond to "x" when I typed that (without the quotes). Help ! Thank you.