I'm also having the same problem on my 2000. I have a feeling that it's the floppy controller chip(s) but I'm not sure yet. At first I thought it was a bad power connector but they all check out OK. Then I replaced the FDs with no change. I even replaced the motherboard with a spare that I had but all that ever comes up is the "256k memory" line, and that's all. Still, I'm only making guess' here. I should say that I aquired my two machines, one with a hard drive, for free but they were not tested. I had to have a video cable made before I could see what was going on with the system, so I'm not entirely sure of what is supposed to happen on bootup. I had the same problem with a Tandy HX a while back, and that turned out to be a bad memory chip that was locking up the system when it ran it's memory test. I've been tinkering with my 2000 off and on as I get new solution ideas but so far, I'm stuck too.