Recently a mac user decided to try upgrading from 9.0.4 to 9.1 (to get to eventually 9.2.2), however after installation and a reboot the mac would totally freeze up at the exact same point, if the extensions are not loaded then it sometimes boots into the desktop however it will quickly afterwards either freeze up or crash.
We have tried wiping the machine and installing from scratch but the same still happens when trying to install 9.1, 9.0.4 works fine.
We have tried the following:
Replacing the memory (and using just one dimm from a known working machine)
Installing on a second hard disk in the machine.
Has anyone got any other possible ideas?
It seems as though to me that perhaps the motherboard is at fault.
The OS ROM is 4.9.1.