This morning, I have paper jam problem with this printer. Usually just take the jammed paper out and it will print again. This time is different. After the jammed paper is cleared, I un-plug the printer and plug it back. I tried to print a copy, and the control panel shown paper jam error. I searched the internet to find a way to fix it. The nets provide all kinds of mechanical check ups such as paper feel sensor, paper feed rubber roll etc., etc. I checked all mentioned and failed. My computer is an old windows XP and a new printer will not be compatible. To buy a new computer will invole new softwares which I do not prefer, too cloudy. I got to make the printer works, no other alternatives. It is not the paper jam error. It is something else. So, instead of focusing on the paper jam, I checked the paper tray. I moved the paper length to LTR. Hey, it works, it prints well. I am happy to share what i found with you, folks.