The only reason would be for quieter audio if you were to use a MML2 sound board. You can change the payout in the menu. The board doesn't matter.

Now this is awesome.

 Ok I did some more reading in the manual and testing. In the manual it says that on any of the reel errors 71, 72 and 73. After you correct the issue for these errors you have to press the reset button and then press the test button right after that to clear the error. The issue was the number one reel coil was kinda hard to pull in. I work with it and got it moving like the other two. The machine is working good now. I played about 100 pulls with no tilt issues.
   I do have another issue I noticed. When I first turn the machine on the coin diverter does not pull in to make the coin go to the hopper. The coin will go to the chute that would take it down to the coin box under the machine. It will finally pull in so coins go to the hopper. It might be after playing 1 coin or 2 coins or maybe up to 5 or so.
Anyone know what could cause the diverter to do this? It should pull in as soon as you turn the power on shouldn't it?

Also should I replace the battery on the MPU board? What type of battery do I need to get if I need to replace it?

         Thanks

Thanks, but I figured it out.

Ended up being the Backplane. I swapped in another one and it works as advertised now.

What a pain it was to put this machine together. It wasn't originally a Vision, so a lot of components were added. Plus, it's a tall box game. It looks pretty cool, just wish it was a better theme than the Double Diamond Run.

Appreciate the help and suggestions.

Curtis ash100

Is there any reason I should upgrade a 501 board to a 504 ?  It is running triple triple diamond.  I did notice the payout is on the board. Does that change with upgrading?