One of my Cubes started giving me trouble the other day-specifically in that it's stone-cold dead. This particular one has Sonnet 800ghz Cube processor and a 2MX video card. In any case, plugging it in gives no LED on the VRM, and no response from pressing the power button. I've also tried powering it up via the display with the same response. I did do a PMU reset. I've ruled out a bad power brick(traded with another Cube-the dead one is still dead, while the working one continued to work). I also did the same with the VRM, and confirmed that the "dead" one has a good VRM(and also didn't boot one borrowed from a working Cube). I don't know where to go from here with trouble shooting. I think I've ruled out the common problems-can anyone suggest where to go next? I should also add that this Cube probably hasn't been used in a month, but it was working fine the last time I shut it down.