Grinding noise, no paper feeding from tray

This will work.

If you remove the paper tray you'll notice a black arm hanging down in the middle of the printer...this should be up inside (the cause is too much paper being put in the tray then when the user tries to remove the tray it hooks this and causes it to be in the way of the paper when it rises).

Disconnect the power and remove the toner/drum. Turn the printer upside down and remove the rollers from the purple plastic arm (shove the arm ahead to make this easier). Once you have this disconnected and removed you'll be able to see where the black plastic arm should go. You can push it back up in the printer without too much fuss. Replace the rollers where they go and put everything back together. Voila!

This has happened twice in the past year and both times this has fixed the issue right away. Good luck! :)