Ok. A client of mine dropped off a notebook that would reportedly not boot up. The problem started this morning. His Norton virus scan seemed to be taking forever to initialize. He left it for a while, came back and it hadn't moved. It was frozen. He then shut the power off. Tried to reboot (in Windows XP Pro). It would get to the point where the white bar creeps accross the bottom of the screen and then (reportedly) reboot and repeat.
Now when I get the notebook about 6 hours later, I turn it on and Windows comes up. I am checking the memory and checking the HD, but I don't expect to find anything. The first thing I notice is that the fan speed is way too high. It keeps oscillating from idle to full, idle to full and after a couple of minutes stays at full. The oscillating makes me think logic board. But the stuck on full and freeze up makes my think that maybe it is just running hot.
The client reports that his fan has been doing this for since he can remember. However, his wife has the same model and hers is much less active.