Symptom
Other computers are unable to start up from the software installation disc that comes with the Power Mac G5.
Solution
The version of Mac OS X 10.2.7 (G5) that ships with Power Mac G5 computers is made specifically for those computers and will not install on any other computers.
This means that Mac OS X 10.2.7 (G5) also should not be used in image mastering or for NetBooting other computers.