I have an iBook G4 1 Ghz and I am experiencing trackpad issue since the last 5 months (slowly getting worse). It will randomly stop working for as little as 10 seconds to as long as 3 hours. When it stops working, there's nothing I can do to make it work again. The external USB mouse is working. Restarting doesn't solve the problem. All the software is up to date. I don't have any third party trackpad software (such as Side Track). I tried reinstalling OS X and resetting the PMU. I am guessing it is a hardware issue. I still have Apple Care for another 9 months. Do you think there's anything I have not tried? I will also be traveling to New York this weekend, do you think I should bring it in to have it checked by a genius? How can I show the problem if it's not happening in front of the genius (It is really intermittent)? I will only be there for two days, do you think they will have the part in stock?