Be sure before you work on it or plug/ unplug things that you turn on the power button with the power cord unplugged and wait for the green light to disappear. Note: The capacitors in this printer seem to hold an unusually high amount of charge. The trick is to stop the printer with the tail edge of the paper still under the toner. If it's only clean print then it's the fuser assembly. If there is then your looking at a defective toner cartridge. Carefully remove the paper and look to see if the ghost image is on the paper already. Once done, you can re-tension the spring and repeat your previous steps in reverse. Open the top cover and remove the toner cartridge. ( be sure not to touch electrical in the system or to unplug the sensor during use) Once you have isolated the problem, it can be overcome by removing the screw on the back of the sensor and removing the printed circuit board. How To Clear Jam in Cartridge Area HP LaserJet Printer P2055dn, 2035, Pro400 Welcome to Smart TechIf your HP LaserJet Printer is showing jam in cartridge a. The sure fire way to test this is to unplug the sensor from the sensor control board in the back of the printer and see if the thing fires up without an error. otherwise the spring will get out of the grove and the plastic paper sensor will stay in the slotted optoisolator and abnormally show that there is a jam. The problem is that when replacing this part after servicing, say rebuilding your fuser roller assembly, this piece must be fed though the the paper feed assembly. The problem is actually in the duplex sensor attached to the back of the print guard, which is accessible via removing both sides of the printer facade and the removing the paper feed assembly.

Hp p2055dn printer paper jam