I recently bought a can of worms, a WCS. Voltage jumper set at the wrong voltage so the coils would fire etc and flippers too powerful.
Changed to correct voltage and coils weak as fuck. Go through it all and no joy so it’s out with the power board and in with a spare, bingo back to life.
Looked at original board and br3 has 2 pins with no solder in like it had been desoldered,WTF. Still had 72v at coils but no oomph. Few more things to sort and all will be good.
I believe in karma, it makes me smile.
Take your time and don’t stress. Plenty of help here.