Frigidaire Professional Dishwasher (needs some work) (Traverse City)

Really nice Frigidaire Professional dishwasher that works MOST OF THE TIME.
When it works, it works really well.
It cleans well and is super quiet.
You can barely hear it running.
It's in great cosmetic shape: no scratches, dings, or other marks.
Once in a while, though, it decides it doesn't want to work properly.
The circulation pump won't run.
Everything else works: it fills and drains, and doesn't leak.
It simply won't circulate the water or spin the spray arms.
After doing this for a few cycles, it will heal itself and continue working fine for another few weeks or months.
I bought some parts and attempted to fix this.
I bought a replacement circulation pump, and a replacement control board.
While troubleshooting, I could not find anything wrong with the circulation pump.
I think it's fine.
I think the control board is the problem, however the replacement control board I bought did not fix the issue.
Perhaps it is also bad? My next step would be to send the control board out to an appliance repair website that will repair and rebuild it.
Both these replacement parts are included.
If you are up for some troubleshooting, you could have an excellent dishwasher.
It's about 10 years old and seems to be built better than the new ones they sell today.