Were you using LR dual coils on it? I've heard in rare cases that dual's below 1.5 ohms at high voltage can put strain on it and cause boards to fry.
No I were using Vivi nova with a 2.8 coil.
The batteries died and I went to change them, and refill the vivi nova, and when I put a new set of batteries back in, it started blinking (I didn't have anything on it at the time)
Tried putting the nova back on, and it fired it up as it should (But now it's giving me the 123, 456, 789 code everytime i take the endcap off and put it back on)
The batteries were at 6.10 when I changed them (don't know if I drained the batteries too much or something and that caused it?)