my scx-4200 printer says theres paper jam when there isnt!

Its really odd, I opened this samsung printer and did not see any paper that was stuck. I had taken out the jammed paper a few days back thinking that would sort it but it still says "paper jam 2 check inside" message. I've tried restarting it by turning off its power completely but still the same thing. Tried refilling the paper tray too and nothing. There is no paper inside stuck anywhere! It just has a red light not green Edit/Delete Message

No warranty of any kind, express or implied:

Paper can quite often be tucked away in spots you can't see, a switch could be damaged, a switch could be stuck open/closed.... if you can't figure it out best take it to a autorised repairer.

I've had the same problem with my samsung. I don't know how to resolve this problem, because I've took it to the repairer, but he said that he had to clean something inside. I think the small peaces of paper where stucked somewhere.