"To my surprise, the small fan had fallen off the 486-DX2 and
the system was running just fine. Based on the amount of dust on
the fan, I figured this happened some time before I opened the
system. I cleaned the dust out of the system, hung the fan on the
486-DX2 (some of the plastic tabs that held the fan in place were
broken) and put the machine back together. It ran fine for another
year or so. Now that is what I call reliability."