High Speed Sound Issue

(Topic ID: 230996)

High Speed Sound Issue


By bahbevans

12 days ago



Topic Stats

  • 4 posts
  • 2 Pinsiders participating
  • Latest reply 8 days ago by wayout440
  • Topic is favorited by 1 Pinsider

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#1 12 days ago

I read through a lot of posts and did not see an issue that resembled mine. Please help if you can.

First, there is a reoccurring rapid sound that is wrong. Sounds like a snare drum hitting over and over. No other sounds, speech, or music plays. It does stop the reoccurring sound when you do enough ramp-ups to lock a ball. When that happens, the music unlocks but there is still no sound or speech.

In music test, music plays. Also in sound test, sound does not play; instead, more music. That might be a clue to somebody out there.

So far, I have change background soundboard, ribbons, and wires. It seems like it is a sound issue with the MPU board, but I am struggling to find it.

#2 12 days ago

Did the sounds work before, and all of a sudden this problem happened?

#3 9 days ago
Quoted from wayout440:

Did the sounds work before, and all of a sudden this problem happened?

Yes. Played a few games just fine. A couple of days later...the issue started.

#4 8 days ago
Quoted from bahbevans:

Yes. Played a few games just fine. A couple of days later...the issue started.

Try making sure all the socketed ICs - especially ROMs and PIAs - are firmly pressed into the sockets (with the power off) then restart. There is a phenomenon called "chip creep", where due to expansion and contraction over time ICs can loosen in the sockets. If you press on them and hear a slight crunching noise, then the chip was loose. See if that helps.

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