Greetings Tweezerhead! Welcome to the community. Let's see if we can figure this out...
Is this a new installation that you are trying to update or have you been using this system for some time and this problem has suddenly popped up? In a terminal, what is the output of "uname -a"?
What sort of hardware are you using (cpu, motherboard, memory, HDD, etc.)?
In YaST, what software catalogs or repos are you using? Try enabling the repos one at a time to determine which one is offering the PPC packages. What PPC packages are installed on your computer that require an update?