The other day i was taking my old impulse out for a run in the forrest.  Everything worked like a charm. After 3-400 balls it started to mailfunction. When i pulled the trigger only a little air was comming out. And the indicator flashed red. And i could not turn it of. With an 2-3 years battery in it i thought the battery was going dead. Borowed another marker and had fun the rest of the day. After a while i noticed the marker had stopped flashing red and was off.    When i come home i tryed switching to a new battery but now it wont turn on.  Took it apart and everything looks fine as i can see.  Any idea what to do and what to look for?

Tryed several batteries and even tested them with a volt meter. The one that sat in had good voltage too. 8,7v.   It rained that day but the board was dry when taken apart.
Sad if it just died     Is there any way of doing a hardware reset? 

I dont find any reset function that could be used without turning it on first.   I think of something like shorting to pins or something.

nice...a buddy of mine had to re-solder his connections too. Over time they weaken.

At least you figured out the problem and kept some money in your pocket!