I have a 12" iBook G3 500 I use basically while sitting round at nights watching TV for internet. Long story short, I upgraded to Firefox 3 and of course it would not run with OS X 10.3. I had bought a 10.4 upgrade on ebay for an other eMac I had and decidd to run the upgrade on the iBook. Everything loaded properly from an external DVD drive. Began the upgrade with no problems. It was going to take an hour or so to upgrade so I left for a short while. Come back to a blue screen and a pointer. Nothing else. Have tried rebooting, etc.. with no avail!!!! What have I done ...and most of all, can I get my little buddy back?