Does the troll switch work in game? Is it adjusted correctly?

Improper switch gap? The one thing I've had on my MMR regarding the troll is that the margin of plastic on the back bottom from the bottom screw hole to the bottom edge of the troll is thin and can break (mine did) and the troll doesn't work properly (not positioned properly anymore for switch registers) unless the troll head is replaced.

Tests - Switch Edge - Hold left troll up, push his face. Does it work ? If not check for broken wires that go to his leaf blade switch.

Easy to have a wire break or diode leg break on them.

LTG : )

I think the question was asking about the "up" switch, i.e. the one that detects/confirms that the troll has been lifted up by the solenoid.

I have the original, not the remake, so I can't comment specifically on how/if the switch could be out of adjustment on the remake. I don't know whether they used the same design.

The "up" switch has always been reliable on my machine, and it's the impact switch that is more problematic. Though in my case, it has always turned out to be the button on the leaf of the leaf switch getting loose and failing to make contact. Wires and diodes have always been fine.

Question is more for my own edification than anything else. Does re-installing the software clear a credit dot like that?

I had a similar issue with the right troll, but mine would not come up at times either, in addition to the credit dot/error when going in maintenance.
https://pinside.com/pinball/forum/topic/mmr-owners-club-all-things-mmr-discussed/page/184#post-6824985

Good question.
What code are you on EightiesArcade

As he wrote it, the up switch is the troll face.

If in doubt check the switch number on the error. #74 is the troll face leaf blade switch, #45 is the up/down under the playfield, a micro mini switch.

LTG : )

But, is that really as he wrote it? It's not how I read it, and it's an odd way to interpret what he wrote IMHO. There are only two posts from the OP, and everything in those posts looks very much like they are talking about the up/down switch under the playfield.

I must've missed where he specifically called out the switch number as #74, or anything else that would somehow indicate they mean the troll's face switch, instead of the up/down switch under the playfield. Maybe you can remind me where that was.

Who cares. Some are hard to decipher or understand what is going on.

He didn't. Since he has the error, he can see the number easily on the error to help sort it out. I posted both numbers and locations to help him.

I'm done. He's all yours.

I had a similar issue with the troll. Mine was broken, and the machine started using the target on the play field instead of raising the troll. After making the proper repairs, I could successfully test, but couldn't get the machine to start raising the troll. I had to "factory restore" game. In the original Williams menus. That cleared the credit dot and of course all my settings/ scores. But that was the fix. Might be worth a try.

Regardless, the OP didn't do a good job describing the issue. He's been a member here for three years, owns about 20 games, but couldn't describe the problem well. If you've ever worked on a MM, you know that it takes a few switches to make the trolls work properly. Complicated contraptions. If you need help with your trolls, specifying switch numbers is absolutely needed. Don't shoot LTG for trying to help. Shoot OP for not getting his message across well.

True enough. But that's reason to ask for clarification if you're not sure. Not to assume something else, then get snippy with someone who is just trying to help clarify things.

Nobody "shot" LTG, least of all me. He's the one that got all bent out of shape just because someone else had the temerity to question even in the slightest way what he'd written.

Why shoot anyone? Why not just try to be helpful, which includes helping the OP clarify their question?

I see no reason for LTG, you, or anyone else to be so hostile to other people. If you don't want to help, fine. But in that case, just don't post anything. Posting rude messages about how badly someone else did something isn't helpful and makes for a very unwelcoming community.

Were you able to clear the credit dot?