Gotta really be careful with high voltage on these things. I'm just rendering my review of them now (still a couple of hours to go) but in it, you'll see when I do the high voltage experiment and hit it at 5.7V for the first time, the entire top of the Vision starts glowing. Apparently I hadn't tipped it enough to feed it enough juice, and it burned dry for a couple of seconds. But it lit up the entire top of the damn Vision. I came quite close to popping it, but luckily I didn't.
It sounds to me like you might well have popped the coil unfortunately.
It sounds to me like you might well have popped the coil unfortunately.