I'm having problems with my Macintrash computer (rev. A iMac) after I installed Mac OS 9 and upgraded to 9.0.4. The thing is that I can't install any Mac OS over 9.0.4 (I've tried Mac OS 8.1, 8.5, 8.5.1-IS, 8.6 and 9.0). I've even tried reformatting my hard disc drive (burning my Applications, Documents and existing System Folder onto a CD for safe keeping).
When I do a clean install (even onto another partition of my HD; which is a Toshiba 13GB E-IDE, btw) my iMac refuses to boot up dumbing me straight into the 'Open Firmware console' (don't know what to call it).
I've tried zapping my PRAM and basically every single advise in 'the book' ...