I do plan on replacing the battery. I only have one HD in it and one optical drive.
When I got it, the HD was gone and it had a zip and cd-I replaced the cd with an Apple combo drive. Also, it was missing the ata wiring so I replaced that with an ata 133 I had laying around (I tried 2, its not the wiring.

Here is exactly what happens. I erase the drive in my G4 and then put it into the G3. Then I boot from OSX CD and install. It works okay, then the next time I boot or restart, it freezes on the grey Apple screen as it is booting. Before that I had the things described before happen.

Thanks for trying to help, got any other ideas?