Never mind.
After posting this question I stumbled an OT posting in another thread with TK MD's reply.
"not a rocket scientist here.... but if you take the battaries out and put back in and pull the trigger the first sound sould be the first capacitor in the circuit, I would find the 2 capacitor and work my way back from them to the power source. And also try to remove the capacitor as skillfully as you can, in case it the wrong one, and re solder it in. Once again i am a very amatuer electronic guy but i have fixed more things then i have broke. I would also wait a while before trying this, someone is bound to crash my theory and give you the right answer
good luck "
When I have the time to try this I will post an How-to unless there is one someplace else that I could not find.
Keith