[My apologies in advance for asking a hardware question on a 
software list, but I figured that this was a pretty good
place to find other folks with my variety of retro-hardware,
and possibly with the same problems.]

My DECstation 3100 fans are amazingly loud.  It wasn't
always this way, but in the last few months it has gotten
really bad.  I tried taking out the power supply and vacuuming
it out, I even gave it a bath, and nothing helps.  I'd just pop
out the fans and put in new ones, but the fans appear to be
riveted in.

Any suggestions?  The fans are currently loud enough that
I don't really want to leave the box on -- the noise is
annoying even in the next room.  Please tell me that I 
can save it, somehow, as it has been a pretty fun box so far...

Thanks,

Kevin