Maytag Neptune MAH8700AWW Front Loader Will Not Dispense Fabric Softener

Hello,

Our Maytag Neptune MAH8700AWW Front Loader will not dispense fabric softener.

I studied the service and tech manuals and ran the dispensor diagnostic tests. Both Valve #1 and Valve #2 on the cold water side run individually, but they will not run simultaneously to divert flow to the softener dispensor bin.

Is there any further testing I can perform to narrow down this problem? I do not want to buy a new control board and find out that is not the problem.

Thank you,
Ken