Lexmark MS812dn / MS812dtn
Remove the tray.
Remove the jammed paper.
Note: Make sure that all paper fragments are removed.
Insert the tray.
If necessary, press on the control panel.
The printer posts a paper jam error with the paper stopping at the rear door. See this article for troubleshooting steps.
Understanding imaging unit yield on Lexmark's MS/MX 310, 410, 510, 61x, 71x, and 81x devices.