My brother in law tried to copy and forgot to open the gate on my RX680. The printer jammed and he attempted to clear it by tearing out the paper. When I returned two days later, I cleared the jam, including all of the bits and pieces left behind. Now when I attempt to print, the machine sounds as if it is printing but produces only blank pages. I have tried both front and rear feeds. The ink cartridges read that they are sufficiently full. Any help or advise would be most appreciated. Thanks