If your eMac is freezing, there's a good chance that yours has the exploding capacitor syndrome. I replaced the bad ones in my own eMac in order to get it running again. It's the same exact issue that the iMac G5s (created at the same time) had. :) A quick way to find out if the caps are bad is to open the memory door on the bottom. I believe you can see a couple caps there. They should be exploded on top.