since the thing is buzzing, the coil power is stuck on.
score motor not running is a problem, especially if it's stopped out of an "index" position as switches may be held closed that should just briefly pulse closed.
the score motor "carry-over" or "run" switch is cam 1, switch A ... see red circle in pic below ... maybe.
I probably shoulda asked if the score motor ever runs at least 120 degrees.
if you can shove the cams counter-clockwise with your finger, the motor turns on and the cams spin at least 120 degrees, ignore all the following.
I'm making the following assumptions:
- cam 1 is the metal cam, cam 2 is the plastic cam.
- switch A is the stack of switches I put the circle on. Is there a diagram of the score motor in the game or do you have a manual? Based on the labels ont he unit, the A label is highly likely to belong to the stack with the red circled switch.
- the circled switch looks like it has a green wire and probably grey wire, which is what the schem says. However, so does the bottom switch on the horizontal stack, so this could all be wrong.
if the circled switch is stack A, you can just push that switch with your finger since it's not 120V, but you can also push it with something non-conductive like a wood meat skewer if you aren't comfortable touching live circuits.
you can also just clean the switch and with the power off, turn the score motor cams and make sure the switch closes with good overtravel.
see http://www.pinrepair.com/em/index2.htm#clean ... lots of good info on that site/page about EM machines that apply to your game also.
tmi below
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notice the metal cam has notches ... the idea is something kicks the motor on, and once the A stack has climbed out of a notch, the carry-over/run switch will keep the motor powered until the A stack falls back in a notch. The notches are index position(s).
the motor should never stop out of an index position.
bullseye cam 1 switch A (resized).jpg