Tried turning my 3XS system on this evening and it wouldn't start, i.e. press the power button and didn't even try to POST.
The motherboard has power because the LEDs light up on there. I tried starting it using the built on power/reset buttons on there but no luck, tried reseating RAM but hasn't seemed to be successful.
My only observation is that the fans spin up for literally a split second first time I try powering on. Then afterwards nothing at all without taking out power cable and leaving it to drain the power.