The Canon Pixma MX700 multifunction printer includes an LCD display that shows various error codes whenever a hardware or software problem occurs. Each error code is tied to a specific type of issue to make the troubleshooting process easier. Error code 5100 describes a physical problem either with a paper jam or an incorrectly seated ink tank. Resolving the error is a quick process that only requires a few standard troubleshooting procedures.
1) Press down and hold the "On/Off" button, which is located on the printer's operator panel, for one second. Wait 15 seconds and then tap the button again. Attempt to print or scan a document.
2) Check the paper feed tray on the front end of the Canon MX700 to see if there is any paper visibly stuck inside the printer. Open the printer cover by gripping the front edge of the printer and lifting upwards.
3) Grab the edge of the jammed paper and gently pull towards you to remove the paper from the paper feeder. Unplug the Canon's power cable and USB cable, and then turn the printer around.
4) Pull off the rear plastic cover tab and check if there is any visible paper jam. Grab the edge of the paper and gently pull toward you until the paper is removed.
5) Push the rear plastic cover tab back into place, and reconnect the power cable and USB cable. Attempt to print or scan another document to see if the error is resolved.
6) Lift open the printer's cover again and wait for the ink carriage to slide into view. Press the "Push" button on the front of the first ink tank. Pull the tank out and then push it back into place to ensure it is properly seated.
7) Repeat the process with the other three ink tanks, and then close the printer's cover. Power the printer off and then back on again.