Hi all There still seem to be quite a few powerpc users on the site who are perhaps like myself and just can't quite bare to give them up just yet... The problem is simple with my old girl, my imac has decided to start spontaneously powering down midway through booting usually around the apple logo stage and sometimes a few moments later just before the desktop would usually appear. I reboot a number of times and after around 4 or 5 reboots(it was after 2 or 3 but it's clearly getting worse) it makes it on to the desktop and we're up and running. The screen crackles(I can't think of a better expression or it at the moment..?) as I move the mouse around for a few minutes then after that all is well.. In my laymen terms it seems as though something is having to warm up first with the several boots before it finally gets going? Maybe it needs to be wrapped in a warm blanket first before it'll work? This problem may resemble the frequently posted about PSU issues, however I've done the mac diagnostics test and all is well on all fronts. I have not been able to find anything on any sites as to what this might be so I guess it could be a new one?! Any help much appreciated!