I'd move this to hacks then.

So I discovered that I really, really dislike ABS. After being incredibly careful with everything, I heard that inevitable almighty CRACK as one of the screw bosses let go. Nothing structural, but equally as annoying. A few minor repairs to the frame are in order to have it in A1 condition again.

Anyway, the iMac is not powering on at the moment, so i'll have to continue investigating this and try to find the fault. I suspect something on the logic board at the moment.

EDIT: Bad RAM. Another stick in its place and the machine fired right up.

EDIT 2: Another screw boss on the front panel let go. These iMac shells are effing awful.