Hi,
Just a thought. I like silent computing and my Amiga 4000 has a power supply fan blowing air the wrong way. It's a known problem that quite a few A4000s are constructed this way, the fan is blowing hot air into the power supply and not out of the chassis.
Now, my questione is this: is it a very bad idea to just remove the fan completly? This A4000 is quite cold, the CPU is a 68060 (CyberStorm MK2) clocked at 50 Mhz. What risk would I be running? I guess the 68060 wouldn't overheat, but what about the power supply?