I have a Morgan spa that has the 4 button digital conversion panel. After the kids were playing in the spa the other day I noticed it kept going into standby mode. Each time I push any button to bring it out of standby, it goes back into standby in 5 seconds. I tried switching off the man power to reset the system but it does nothing.

I suspect the pump button switch is broken and is in a state where it is constantly being depressed to initiate the standby mode since that is how you put it in standby mode, press and hold the pump button for 5 seconds. Does this sound like correct assumption?

I found the Balboa panel 51676 has the same controls. Might this be as easy as swapping out the control panel?

Thanks for any advice!

It's possible. But pick your less loved poison first, topside contol panel, then circuit board after that if the topside replacement doesn't do it.