I've got an Elvira and the Party Monsters pin and have noticed that during gameplay, not at any specific time but it does seem to happen when I'm having a longer game, it will make a very loud popping noise(best I can describe the noise would be the same sound a balloon makes when you pop one). And it's only a one time pop but it happens enough for me to post on here asking for help and it's very loud and it worries me. I'm new to pins and don't have any experience taking them apart. Any thoughts?
Sounds to me like the knocker. Its letting you know that you won a free credit.
Its supposed to be loud as people would walk away from the game in a noisy arcade so they needed something that would get peoples attention.
The knocker is located in the upper left of the back box.
You can disable it if you want ... put foam at the strike point to muffle the sound somewhat .. or make sure that the replay or free credit settings are difficult enough that the frequency does not bother you as much
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Yes, people often describe the Free Play Knocker as an almost "electric" arc popping sound. Even when some of my machines do it while others are playing it (particularly those set with a low free game setting), I immediately swing around thinking maybe a transistor just blew!
Sounds like that could be it, it is set to free play and i'm sure the settings are on easy. It seems to happen when I hit a big score i.e. shot the million or 3 million etc.
yep thats exactally what it is, still scares all my friends, when all 6 games are going, you hear that aot, and people are always jumping hehe Eric
Waterloo, Ontario Collection : *UPDATED*
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The Knocker is one of the main goals in Pinball, Don't disable it, If anything, change the coil sleeve and plunger and make it louder! hehehe It is all about the Knocker!! And be sure to yell "Replay" everytime it goes off, no matter where you are in the House!
Dave
Here are games I would like to acquire this year, or sometime...
24 Iron Man Attack From Mars  Prefer Pounded playfield! Monster Bash      Prefer Pounded Playfield! Elvis Sopranos Batman Forever Spider-Man  Stern  Prefer Pounded Playfield!
Have these available for trade or possible sale: Corvette  South Park            Theatre of Magic Twilight Zone RFM/SW:EP1 Nucore Combo AFM
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And be sure to yell "Replay" everytime it goes off, no matter where you are in the House! 
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