Hi. Have an iBook that originally had Panther on a 30 GB drive. I upgraded to a 160 and Tiger, and for a while, it ran just f...

I should have seen the clue right away. When I had tried to apply thermal paste to the video chips, I'd noticed that the heat sink didn't quite make contact with the top of the chip. I figured it was because of those pads that were in between, but it bothered me all the same. Then it started to dawn on me - when I bought this iBook (used) the frame was broken, among other signs of abuse, so I ordered a new one from ifixit.com and transferred all of my innards onto it. First, though, I made a reasonably thorough inspection of the new frame to make sure it was the right one. It looked right, and for a while, anyway, there didn't seem to be any problems. With a connection beginning to form in my head, I opened up the book again, and made a closer inspection in the area of the heat sink. Lo and behold, I discovered that the machined surface where the heat sink was attached (at the point where the HDD rail screws on) was about 1.5mm higher on the new frame! This was JUST enough to prevent the heat sink from gettin...

Hey cool - thanks for all your responses! Where to start? Yes, it's always the same or pretty close - 8-10 minutes to freezeup. I agree with the guy who said don't do this too much, and I don't leave it on after it freezes. I have pretty much eliminated disk problems, since it exhibits the same behavior with the 160GB drive, the original 30GB drive, and when I boot up the install cd/dvds, both Panther and Tiger. The problem will show up on time, even if the machine is idle - doesn't seem to be tied to disk access. I got a utility called iStat Nano, runs on the dashboard and tracks temps in several places - CPU, HDD, GPU, a couple others - I haven't seen anything over 34 degrees before the freeze. When the computer was working, it would get much warmer than it gets now. I have also run the iBook with the covers off, and felt around the logic board and there are no hot spots apparent. Of course, the heat sink gets warm. I think I hear the fan briefly run during POST, haven't heard it otherwise. And no system or...