I sent a reply, but got an auto-response about spam.

First thing to try, as you plan, is to kill / reset the power, see if the dead drawer recovers. I'd recommend disconnect about 30 seconds to a minute.

The two drawers are fed power via a chassis "mains" board located on the floor of the cabinet (it also has the flood sensor and sends power to the four lid motors). The mains board has connectors for wiring harnesses coming from the controllers on the two drawers. I suppose it's possible the mains board could fail in a way that only one drawer goes dead ... otherwise one dead drawer indicates a bad controller board on that drawer.

The usual recommendation for troubleshooting is swap the controller boards between the two drawers to see if the "deadness" follows the boards.

I don't recall running across mention of it ... but I just now had an idea that swapping the upper / lower controller connector positions on the mains board (assuming the connector plugs are identical) might be a way to check if the mains board is the fault. If it is in your case, the lower drawer would go dead and the upper would work. I suppose if the upper/lower condition didn't change, then that would indicate the respective drawer board is the problem.

Swapping the drawer boards requires removing the front panels and, of course, physically removing and moving the boards.

Access to the mains board is by pulling out the lower drawer.

If you feel up to trying either procedure, I can give you some instruction and also send a service manual (although I don't suppose you'd be able to receive it past the spam blocking).

Thanks, Dad. My SPAM filtered alerted me your note was there, so I could easily retrieve it and "approve" you for future e-mails. I'll study your suggestions tomorrow and see how best to proceed.

Do you think a non-tech-savvy woman can pull out the lower drawer to access the board? AND, how do you remove the front panels? They look like SS to me.