Currently Being ModeratedJan 22, 2014 5:22 PM (in response to dylnamite)
Which PowerMac G4 is it? Is it dark graphite plastic or silver colored on front?
If it is dark graphite Plastic, look at the rear:
If it is a PCI model, you are going to have a harder time than an AGP model.
You should at minimum be able to boot with the Option key instead of the C key, using the startup manager:
The 10.4 installer disc should look like:
and not say Upgrade or Dropin or OEM.