The error code C0840001 appears on HP printers like D1660, F2180... Sometimes, you can ear a grinding noise. Solution 1 : Turn printer off. Open the door. With a flashlite, look inside to the right side where is a small tray that slides forward and backwards. Push the tray forward until it stops then move it backwards until the little black tab on the right is 1/2 inch from the metal part of the carriage. Close the door. Turn printer on. Solution 2 : Look for a spring and lever arm with some small gears. It is located to the left of the printer, near the guide rail. Put a couple of drops of oil on the gears and lever pivot shaft.
Reset printers and cartridge. Printers problem solving,tips, tricks and tutorial.