Wife and I picked up MMR at the Grand Ole Gameroom in Nashville last weekend. It has been on our wishlist for 3 years now.

Previous owner has already added the shaker motor. I purchased some Super Bands from the Marco's booth and put them in at the show. Cleaned up on the playfield, mainly some minor ball track from normal use. Once my bank account recovers, I'll upgrade the display.

About 645 plays on it when we got it home. I think the previous owner said it had about 250 to 300 plays prior to the start of the show.

I'm having some issues with Solenoid Driver 3 board. Castle gate would not lift and left troll as well stopped coming up. When I went into test mode, I had somewhat sporadic operation of the gate, it would pop open most of the time, but then maybe miss a few pulses. But with the left troll, I could see it just barely trying to lift at a steady pulse rate.

I pulled SD3 out, fuses good. Looked for cracked soldier joints or any other types of visual clues, nothing found. Put the board back in. Good voltage from power supply at the SD3 board. Back to testing, now the gate seems to be working consistently, but the left troll is just the hint of movement. I plugged left troll up to gate position and with that, the left troll started to work to factory design.

Talking over this with my wife, I mentioned the SD3 also runs the catapult and she mentioned that it has been weaker, a couple of times the ball did not make it around the ramp to the left return lane.

Is there a known issue with these boards, common point of failure? Or will I most likely need to just outright replace the board? Any input is appreciated.

Well haha funny, so I had pulled the board out prior to posting and reseating it, no change. So I pulled out the board and swapped it around with the one on the right side... and the same thing. Looking at the manual... stupid me... I was doing the left troll HOLD test.... not the pop the troll up test... so doing the correct test, the troll is jumping up as he should, the gate is opening as it should... I would say it was possible your suggestion was correct, just I wasn't smart enough to test it out correctly.