may be that the fiddling with the back of the unit moved the pcb enough to "fix" the cold solder joint which is almost always on the flyback on the 1084s.
one time this happened to me and I was too lazy to discharge everything on the monitor, I stuck a sharpie pen between the flyback and its metal shield and that bridged the correct cold joints to make the screen come back on... in fact I left the pen in there, and put the cover back on...
