Quoted from Vin-bot:

Just checking if this is normal or not…
I previously before restoring it, have not played my Pinbot enough to notice this, but now I have.
The sound effects don’t always play. Example:
Going up the blue ramp, the effect created by the first switch and the explosion effects then hitting the mini playfield are not always heard.
Same goes for other effects like the one you hear when hitting the colored targets. They all work 99% of the time, but sometimes one of these effects is not heard when hitting that target.
It doesn’t bother me at all, but I was just wondering if this is normal. It’s almost as if there is too much happening at once for the sound effects to keep up with the action.
I got a new CPU btw, so that’s not a issue. All diagnostics show the game is working fine.