I've tried swapping plungers no difference (slightly different link).  It just seems as if the coil is not holding the plunger long enough...

2nd issue - playfield insert lamps..Seem to be missing a few - globes are known to be good.  I suspect a connector issue to to blame not not 100% sure as yet.

3rd issue - sound.  Being an export model - no speech but sound 6 seems to get stuck in a loop.  Both in game play and in test mode?  NFI re this one!