2. Check whether there is any paper jam or foreign matter inside the printer, and take out the paper jam or foreign matter.
3. Check the rear feeder for paper jam or foreign matter, remove the paper jam or foreign matter, and then reinstall the rear feeder.
4. After completing the above inspection, restart the printer.
5. After adopting the above method, the fault can't be eliminated, indicating that there is a serious fault in the printer. Contact the after-sales department.