G&P M249 Box mag issues!

[Darkmikey22]

Hi guys,

I'm having some funny issues with my G&P M249 auto winding box mag.
Normally, every time you pull the trigger the box mag would kick in and would carry on winding for a 5-6 seconds longer once you release the trigger.

Yet all of a sudden it stopped winding after you release the trigger. It still turns when you pull the trigger, just not as quick. I have also found that the pressure switch isn't working either.

I tried all 4 of my batteries (9.9V 1600mah 25c Li-Fe), 3 of them did the above yet to my disbelief one of them run the box mag like nothing was wrong!
So thinking it was the batteries that were duff I bought 3 new ones. But even the new 3 didn't work.

Tried the wiring in another box mag to which it worked ok. So it only leaves the circuit board!, but how does it explain the odd battery?

For once I'm kinda confused

any one got some idea as to what could be wrong?

Many thanks

Mike

[Lozart]

Could be a flaky connection that got moved when you tried one battery so it worked, but moved again when you tried another so it didn't.

[Darkmikey22]

I'm not so sure.

No matter how many times I try it, the only battery that works is the old buggered one.

I did possibly think about wrong polarity, but have no way to test that and all the wires are where they should be.