So it appears I'm not alone. I did a "postmortem" on the failed card, and found that the power input socket is fixed to the board by 2 small prongs soldered to it. The socket itself is elevated above the board by a couple millimeters making it very susceptible to any stress placed on it by the power cord. There's also a fuse that fails the smoke test at a bit over half an amp. Now I'm no EE, but that sure looks like a recipe for failure to me. The replacement board Kinetic sent me has the exact same "features", so I'm none too optimistic about it's long term survival either. So I bit the bullet and bought a new Tacx Flux 2 which functions much better and appears far more robust. I'd like to find someway to recoup my loss on the Kinetic trainer, but I just don't have the cheek to sell it off to some unsuspecting stranger. So I've got a $400 green door stop.