Did they try resetting it? Is the power on?
They power cycled, and tried opening and closing the stapler door.
What they did not do, though, is move the chair next to the printer, that the output tray (that's supposed to move up and down) was getting stuck on. So it was trying to lower the tray, but the arm of a computer chair was in the way. No user in the chair, no reason for it to be anywhere near the printer, just there because some turd has no concept of moving parts.
Whatever, I just got paid mileage and time to go move a chair. Weather's nice, I'm not gonna complain.