Try a new battery, or batteries. The SLG is pretty picky with 9volts, so if the battery is lacking some voltage, your pancake solenoid probably won't get enough power to energize the sear, especially a sear that has a pressurized bolt pushing against it (unlike most other battery efficient electronic sear-trippers that have a simple sprung hammer pushing against its sear, the SLG has a pressurized bolt pushing against its sear, so it uses more power from the battery to engage it)
Worst case scenario, your pancake solenoid is bad. Worst of the worst case scenario, your electronics are bad, but I highly doubt it.
Other causes might include a too long of a sear spring, a too low of a dwell setting, the bolt assembly might be under-lubricated, and/or the bolt assembly O-ring size(s) are off due to misplacement or swelling
Last edited by tgs-killer : 05-28-2012 at 10:18 PM.