Solving error code C0840001 on HP printers

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.