I moved into a house with a number of sliding doors. NOT external, sliding glass doors like the sort that lead onto a porch. These are the wooden kind that separate rooms and slide into the interior of the wall when opened.
The problem is that several of these doors are essentially broken. They seem to have come off their track somehow and can barely be moved more than a foot in either direction. No amount of jarring and shaking the door has produced any effect in getting them back on the track properly.
Without tearing the entire wall open, is there any way to repair these doors so that they slide open and closed with silent ease, as they ought to?