Help!!, Cannot upgrade to OS9.2 Options

[JackC]

I have a Dual Processor 500Mhz G4.
The only disc it will boot off is 9.0.4
I've tried booting off a 9.1 disc, an OSX (10 & 10.2) disc, Norton Utilities 6 disc.
Even if I install 9.0.4 and try and upgrade to 9.1 - the mac crashes when I try to run the upgrade installer.
Basically looks like this machine doesn't like anything above 9.0.4!!
It runs fine under 9.0.4 with Logic 4.8.1, MOTU PCI-324, Adaptec 2940UW, MOTU MTP AV.
I've stripped everything out of the machine, even swapped out the RAM as I heard this might be an issue.
Back to the bare bones of Monitor, Keyboard, Mouse and 1 slot of RAM;
no joy. I've used my OS CDROMs and borrowed discs from friends thinking my disks might be damaged so dodgy CD's are out of the question.

HELP!

[gdoubleyou]

When I upgraded from an 8600 to a G4/400 I had to ditch my 2940UW. It would not live with my audio and video cards. Especially my second ATI card for dual monitors.

I installed an IDE drive and all is well. Tested 50+ 16bit mono tracks.

Check the Apple and Adaptec sites for more info.
I was also under the impression that Adaptec was dropping Mac support.

Try removing the 2490 and installing the OS.