So I picked up my first Stern Spike 2 the other day, playing great so bought a set of Pinsound speakers on a Black Friday deal. I normally put my own speakers in but thought F it let’s do it easier, turn it back on go into settings etc but not over the moon with the sound difference

Needs an amp, sub is awful and I know they can sound good from previous experience.
Anyway go to play a game and the left flipper is working intermittently, WTF I only replaced the speakers

In switch test switch is intermittent so something not connecting somewhere.
If I bang the flipper button it will work more often so dodgy connection, trace the flipper wire back up to the node board near flippers. Meter from buttons to board and ok, turn game on and push connector while flipping and working mostly and obviously the issue, pull connector off and surprised it was working before as 3 out of 5 crimp terminals knackered.
Replaced them and all good, crimps are so small what a pita that was!
After I worked out the fault I went online to check and it’s a common problem so could have saved some time but good to work things out yourself sometimes.
Lesson is if you have a Spike 2 don’t bang the playfield moving it back in