I have the iBook.
It freezes while installing OS X from the iBook install CDs.
There's just barely graphic tearing when this happens. It occurs around a third of the way through.

first, I'll pick up some copper sheets fromt he hardware store and cut pieces to fit between the GPU heatsink and GPU, which will aid in cooling and reinforce the connections to the logic board if the soldering is faulty.
I'll do the same with the CPU, and use the remaining copper to create a heatsink for the hard drive.

I'll also inspect the logic board for any obvious damage (of course).

Happy hacking,
“Creative ability is best displayed with the most basic tools."

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