Sorry, but I can't work anymore on that overpriced noise-machine. For about one week now, every three minutes, my dual PowerMac starts to put the turbo ventilator in for about half a minute. This captures every concentration and I only can overhear it, when I put very noisy music. My productivity is close to zero. Has anybody any idea, what I could do against it? Without spending again so much money? Does anybody know, what happened to that petition complaining about these noise producers? Re Phil