Hello, my name is David. All: "Hello, David." As I was innocently using my beautiful Dual 1.25 MDD (with a perfectly tuned Jaguar 10.2.8, courtesy of AlSoft), my computer locked up. Upon a forced re-boot, I got the "prohibitory" or "NOT" sign (circle with a line through it) after about two minutes. I even tried booting up off of another HDD I have in the computer by unplugging my main disk drives - to no avail. In addition, I tried unsuccessfully to boot from the bootable diagnostics disc - nothing. In fact, now the "watch" symbol, if it illuminates at all, freezes as well; the startup chime is now gone, too. PRAM and PMU have been reset. I even replaced the power supply with another that I keep - again, no joy. I am therefore requesting the following responses please: 1. More than likely I will either need a replacement mother board, logic board, or a replacement of one or both CPUs. Does anybody know what this may cost? 2. This MDD is not even two years old; I am sending this message via a cheap Dell which never seems to have as many problems (but doesn't get nearly the usage, either...). Any notes/responses of support and condolences to keep me from going to the Dark Side shall be greatly appreciated! Thank you all.