Nothing happens whatsoever. It's as if the cover is jammed in the open position but there is no noise or hint of anything happening.
Lifted the lid as high as I could,even to the point of lifting the printer, and let it go. It closed very slightly so I did it again and it closed a bit more to the point where I could push it closed with some resistance.
I have checked that it prints and after much whirring it eventually performed the task.