Epson ET-15000 problem

[Bonnieh]

Something accidentally dropped into the back of my Epson ET-15000 printer through the rear paper tray and got jammed in the rollers. I was able to pull it out with forceps. But now the printer will not print. I looked when it tries to print and everything looks normal as the paper moves through but apparently is not. There is no error code. What could I unknowingly changed at the back side of the rollers that would affect printing? Service is so expensive, I may as well buy a new one if I have to take it in.