Thanks Edward,James, and Steve,
James, I had disconnected shore power as we were preparing to leave when the slide failed to close. Next time we move I will leave shore power attached and see if I have the same issue.
Edward, Thanks for the info on brake. You mention no noise but I am getting a clicking sound from under the bed. If shore power tip doesn't work I will remove brake.
Steve, Thanks for the links - I know location of motor/brake but will start searching for the circuit board/relays in case above tips do not fix my problem.
Darrell