I've actually had both go bad -- I think both have components that are subject to repeated stress, and prone to fail. Try examining your power cord for a broken connection -- mine went bad where the think cord meets the end that plugs into the compute. (I should think it would be fairly obvious, accompanied by slightly burnt plastic, though that may not be the case.) BRIAN PEARCE Red Jacket Press, LLC <http://www.redjacketpress.com>