Got a B&W with Sonnet 400mhz zif cpu. It would not load any system. Found that if any ram stick was inserted in a partiular slot, it would not boot.

With that slot empty, the computer installed 0S9 with no problem. Then tried installing OSX and it keeps jumping into Open Firmware. Tried Zapping the PRAM but nothing

Any ideas?

Edit: Used XPostFacto 4 Have Firewire,usb and ATTO SCSI cards installed.