My hunch (about the smoking, crackling now-it-won't-boot problem I previously posted here) was correct: VRM board. Unfortunately, I disregarded warnings about trading parts around to identify the problem and blew out (I think) another board. I believe I am in the market for a motherboard for my now-unbootable 2 Cubes. Since I currently have 3 Cubes, one of which is running, I can perhaps trade parts and/or PayPal. My last resort will be eBay but will certainly go there if necessary. Thanks Jan Georgen