Q: I have a iBook G3 and I'm trying to install OS X 10.4 but it doesn't work, why?

Oh gosh, this is ancient history for me.

First, I remember some sort of third party boot enabler being required to install OSX on some G3s.  Not sure if it included iBook. http://eshop.macsales.com/OSXCenter/XPostFacto/Framework.cfm?page=XPostFacto.htm l

Second, which exact set of installer discs?  They have to be black colored retail discs, not grey ones which came with a specific model Mac and will only boot that model.

What are the exact specifications of the computer?  Does it have sufficient RAM?  You're asking a lot for a G3 to run Tiger.

Grey ones will not work.  They only work with the hardware for the machine with which they are were supplied and your kernel panic problem is typical signs of incompatible hardware for those discs.

You need the 10.4, 10.4.3, or 10.4.6 black retail discs as described in this tip:

https://discussions.apple.com/docs/DOC-2541