I've got a Nightmare on Elm Street that has some sound issues. It seems to play fine at startup, but after a few minutes I will start hearing a random screetching noise sometimes and then at end of game it cycles through all the callouts over and over again (which also sound a little distorted).

Anyone else ever ran into this issue with their System 3? This is my first System 3 so this is going to be a learning process I'm sure.

So far I’ve re-seated all connections in the backbox and even went as far as re-seating all removable chips on the boards. It seemed to help a little bit because now when the sound issues happen, the game seems to fix itself after a few seconds rather than needing a power cycle.

My voltage on the power supply is 5.03v.

Any ideas where to go from here? I’m starting to think maybe the game ROMs need to be replaced?

Ideas? Anyone? I can’t find anyone else that has had this issue.

Does anyone know what the voltage should be coming from the main power supply? I’m measuring from c19 on the CPU.

My Freddy is having strange issues that I can only think are coming from low DC volts or flaky game ROMs.

I’ve been having strange sound issues and now the boiler door seems to have a mind of its own all of the sudden.

I could have sworn this game already had the ground mods done but I just looked and sure enough, it’s the original connectors. I guess I have a project for tomorrow.

Thanks for the suggestion.