yes it does sound as (since it had been sitting for years idle) the brushes may be stuck in thier holders and not making good contact with the armature.
If that motor is similar to their older motors it may have an end cover that can be removed and you can look at the brushes?
See if they are corroded or stuck.

What your seeing on the display guage is it cycling through its check phase, it shows the controller model or firmware number and then goes to 'on' mode which displays the hours.
If there were any problems during the self check it would have displayed a module number with an error code probably. Since it did not then it sounds like something along the lines of what edward said.

good luck!