upgrade

I have a 195 MHz R10K motherboard that I want to replace in a "non-working" Indigo2. I would appreciate any advice on this, since I am not sure how to remove the EISA daughter board. I've built PCs in the past, but I'm a little bit clueless with how to approach the Indigo2.

Hi I finally got my first SGI machine, an O2 with R10000 195MHz The machine is installed with IRIX 6.5.11 I've downloaded the 6.5.30 images from archive.org but I haven't used IRIX since university 20 years ago and I've never installed it. Can I use Software Manager to upgrade the install?