This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
Indeed, the 'demon is a power gobbler-- roughly 1.5A as I recall-- and some of the IC's run hot. When the board bombed after one long session, we cut out a square section on the back of the II+ and added a mini-fan, just to blow air across the 'Demon board. This ended the heat problem. By: Douglas M. Howell
 
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