The doors utilize compressed air. It's not so much 'losing power to the door' as it is air leaking from it and needing to be drained and recycled. Fairly easy to correct, when you know what you are doing. The issue you are speaking of, however, was a day that the doors were going haywire and that did not have to do with the compression. It's been fixed as far as I know. We haven't had the issue again...yet.
*cues ominous music*
The Right Honorable Count Boogie Bonz of Random, at your service.