I just re-installed OSX 10.4 onto my old G4 iBook, and ever since I did the trackpad has stopped responding. When I plug in a USB mouse and check the system preferences under the keyboard/mouse panel I can't even see a trackpad listed, so it isn't being detected at all. I've tried re-installing the OS and it hasn't helped the problem. Ever since this happened The sound also doesn't seem to work anymore. I'm not sure what to do here, but it's pretty important that I get this fixed. Any ideas?