MAC G5 wont boot to install disc

[halftrack]

Hello, I dont know the password to a MAC G5 I bought. I have a G4 install disc and two white install discs witha leapord skin X on them one says install disc 1. the G5 wont boot to the install disc when I push the C key. I have reset the PRAM 1, 2 and three cycles. It wont boot to the G4 disc either. Disc is version 10.2

Thanks a bunch

 

[eyefoniac]

If your install disks came with another computer, they most likely won't work on this one. It would be best to find a new install disk (like the leopard disks they sell at the Apple store).