I've been using a Tacx Vortex trainer for a number of years, recently as I completed a ride I heard a electrical short sound and no power after that. Garmin replaced the unit and the exact same thing happened, replaced again and again today the same thing happened. To be extra sure I used a surge protection plug, even though I have an inverter with surge protection. Any others out there with a similar problem/experience? I've been trainer-less for the past month and have to do another trip to Garmin with yet another burned trainer.