Update on the Miprom 21.

As stated all I/O 's and voltages looked fine and no faults were displayed. I was incorrect on the registering of hall calls as they could be registered and would remain registered.

The elevator was about 3/4" below bottom landing. Not on directional.
Mechanic reset main line power but problem remained. He then removed all Miprom 21 boards from the card rack then reseated them back into slot. He then removed all ribbon cable plugs and reseated them. Car has been running since and tool logs on no problem.