Dacor MOV230S-CAV L55 latch/door error and lower oven will not bake

[TECS]

Hello Samurai Team.

Post recent relay board refurbs from CCS I had visions of double oven roasting and baking for Christmas 2020. So much for sugarplum visions, my battle continues. I purchased this unit in '09 and it worked well except for a U34 code. Last winter the lower oven quit, no self-clean on upper/lower and the display went south on me ( bad ribbon cable LCD to LED board). CCS repaired the upper and lower relay boards last week. Reassembled today. Lower oven still returns to main menu when selecting "bake>start". Upper oven bakes, broils, etc.  Neither oven will latch and clean. Wondering if I have a logic board issue and what to check.

Any assistance greatly appreciated, still saving for my contribution to the Samurai Beer Fund and a refresher course in Appliantology ( AASET grad c.1980 ).

Have tools, will travel;

Tom

[TECS]

Update:

I snagged a copy of the service manual... going through limit sensors, door latch mechs, and wiring now.

I have a gut feel it has something to do with the control board but we'll see.