Printer Repair Questions? Ask IT Technicians for Answers ASAP
I see you have accessed most of the common areas when the jam occur however you may have to open the printer a bit more further.
unplug the power cable and then try to remove the rear and side cover (left).
Access the fuser assembly and remove it once its out you can roll the rollers manually to see if there is any paper stuck on the rollers or sensors
and check the paper pick rollers and sensors too.