All the electrical is off, refrigerator and freezer is working. Display reads 5b.

Do you have a manual to determine what the code 5b means?

Could it be S(ess) b, rather than 5b?
I am finding references to Sabbath Mode (Sb) when I try to research your ref. to 5b.
This is a long shot but check out this link: What does Sb mean on the door of my frigidaire refrigerator - Fixya
"Typically SB indicates that the unit is in Sabbath Mode. It is a feature that disables portions of the refrigerator and its controls in accordance with observance of the weekly Sabbath and religious holidays within the Orthodox Jewish community. Sabbath Mode is turn(ed) ON and OFF by pressing and holding the down arrow on freezer temp and up arrow on refrigerator temper for five seconds."

Here is the manual: https://dl.dropboxusercontent.com/u/...5392593%29.pdf
You may have a door switch that is not working. You will need to check it with a meter. Here are some manuals on how to use a meter: https://dl.dropboxusercontent.com/u/...e%20Manual.pdf
https://dl.dropboxusercontent.com/u/...e%20Manual.pdf
https://dl.dropboxusercontent.com/u/...Electronic.pdf

Mama3467,

Any luck with the problem? Does the ice dispenser work? If you have an opportunity let us know if the problem was found. Maybe we can use your experience to help others in the future. Thanks, smearcase.