I have an old SparcClassic X which is next to useless and I have been using as a foot rest for a while. So I decided to upgrade it a little using my Mini-ITX board that I am currently running as a home server.
First of all take out all the insides. You have to break a few plastic welds to get out the IO board and a couple more to get the tin sheilding out as shown here.
Next go at it with the hoover and then some kitchen paper and
soap to get rid of 20 years of grime!
… See my Tabblo>