Quoted from Joker2415:Thank you! I'll check the link out!
You know, Now that you mention it, when I was turning the volume inside the one machine, it sounded scratchy. I think I have some in my "experiment" pile of parts. I'll have to see if I have one the same size and try it. I ordered parts for the cpu,to replace corroded SRC's and other parts in that area, so I'll have to wait till I get that back together to try it. The corrosion was bad enough I could taste it when I was messing with the board. Kind of like when you change and clean the terminals on a car battery.
The other machine makes the noise with the display changes(Rescue 911) But...........That is "her game"(she thinks)! And she plays it every night. So, I have to leave that one alone until I get the other one completed!
The potentiometer controlling volume is probably dirty on the inside. You can take it apart and clean it or track down a replacement.
If the DMD is making a lot of noise, it's usually a Cherry-branded display, and the only way to fix it is to replace it.
