I had my A4000 get executed by memory eploding on the CV64/3D. (Seriously now, blue sparks and stinky smoke, and one of the chips had a hole in it.) Sent the CV64/3D back for repair and eventually got a replacement. A4000 suffered a moderately burned trace on the mobo that there was no way I was going to be able to fix. It kept working, very VERY badly for a while, but one morning when I powered it up, only a cold unfeeling black screen was shown. It had been giving me really random crashes and failures to boot up properly before hand. I tried everything to get something out of it, but nothing worked. I was able to part out the good bits though to some guys around who still used Amigas and make back a couple bucks.