I moved my V1 from one car to another and went to turn it on - nothing. I tried a different jack, still nothing - other electronics worked in the same outlet.
It turns out that when removing it from my first car, I inadvertently popped the fuse out and did not notice it. I didn't even know the little sliding door was to remove the fuse.
So anyway when I got to the boonies and downloaded the manual and found I needed a 2 amp mini-blade fuse, the hardware store fortunately sold an assortment of mini-blades fuses (in one package without the amperage shown on the exterior packaging). Anyway fortunately there was a 2 amp one in the package, which I believe is also know as an ATM-2.