Hello, again. My PowerBook's trackpad stopped working when I put a replacement motherboard in, so I thought. Everytime I hit the power button, the startup chime comes on, but nothing else happens (black screen) for about 30 seconds to one minute, then it boots normally. So I've ordered a new top case with a trackpad for $16 total, and it's doing the same thing--NOTHING. The click or tracking doesn't work. I've reset the PMU, and cleaned the port with alcohol solution. Now it boots normally, but the trackpad continues to do NOTHING. I've looked in the System Profiler, and it didn't even notice it. Hopefully this isn't the motherboard. Everything else works fine. Any help? Because this is FRUSTRATING!!! Thanks.