What's wrong with the PPC install CD's since 2006 edition...

[Gnttng]

Please, I cannot understand what's wrong with the install CD's after last 2006 edition.

The last good edition that booted on my laptops was the 2006.1 one. I have not been able to boot a single CD after that very one.
I have downloaded burned and tried every year every single update till this year 2014 but NO ONE is booting on my three old laptops.
I 'm using the last PPC PowerBook (2006), the last PPC iBook (2005) and an older iBook (2001).
The last and ONLY one that booted was the 2006 and the previous editions.

What's wrong with these install CD's ?
Do they refuse to work only laptops or also desktops ?
Anyone had my experience ?
Thank you
_________________
New in Gentoo but enthusiast !

[anthonyw]

I'm using the latest ppc cd on a G4 desktop right now

https://forums.gentoo.org/viewtopic-t-1000978.html