Hmm. Sounds to me like the connection between the floating pin and the battery may have become disconnected - which I've never really heard of with the MVP. I take it you've tried to fire up one of the tanks (even though it registered 'non') and it didn't work? I mean, if it did work - that'd be a totally different issue. To be honest, the only thing I can think of is that the floating pin needs pulled up a tad more, or it's already been pulled up too far. I would start looking for that warranty if I were you...
P.S. If you haven't tried to fire up a coil and plan to - make sure it's a factory-made coil or if it's a custom-made coil, make sure to test that resistance on another device before trying. Also, this is a long shot but...have you tried locking and unlocking the device? (Press the power button 3 times to lock, and again to unlock)
Hopefully somebody knows something I don't and can help more
