I tried to replace the noisy fansink on the old Via EPIA 800 yesterday. Seems that the hints at the mini-itx.com project page. My board didn’t have the fansink attached with thermal grease, it used some kind of very sticky pad.
So, in (gently) wrenching the fansink off the board, the board now won’t boot. It feeps loudly every few seconds, but there’s no video output. Feh. At least I dodn’t pay anything for it, but I hope that the RAM’s not broken, as I have plans for a small, quiet SMB/print server.