Just saw this thread linked from another thread and...
Quoted from Whysnow:I have had people turn off a machine due to a credit dot. That credit dot was because they played 20 games and never went out the left outlane.
It's interesting - when I first got into collecting, I thought the credit dot thing was great because it would be so much easier to check the machines.
As you know but for anyone else, it really isn't. You still open up the game and see what the game throws as test issues.
The only thing the credit dot does is to stop people who feel like they are informed from playing a machine, often for no reason whatsoever. It's surprising how quickly location games can get credit dots just from people not playing well.
As for turning off a machine, as I said in the other thread about leveling machines, ask the location. If the problem is bad enough, the location will turn it off. If the problem isn't a big deal, they work.