HP LaserJet Pro M501: No Paper Pickup when there is paper in both cartridges

What is the fix for this?

Turn the printer around and look from the back into the tray. Lift the cover to confirm that the paper lifts properly and that the roller is turning. Check if you can hear the roller and try to pick up the paper.
If the pickup roller does not rotate, push the paper far inside or use the priority tray. If this does not work, check for deterioration of the rubber on the main pickup roller. If the rubber is in good shape, proceed to the next step.
Check if the main paper pickup roller is rotating when the print command is given or when the 'check' button is pressed after the error message. You can view this from inside the printer through the priority input slot using a torchlight.
If the roller is not moving, a component in the gear train needs attention or replacement. The gear train is located behind the formation inside the right side cover.

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Customer Replay

*****

Top answer

Let's make the instructions step-by-step:

Customer Replay

did that several times

Check for deterioration of the rubber on the main pickup roller (Replace if needed).

Customer Replay

rubber is in good shape

Ensure that the main paper pick-up roller (view inside the printer from the priority input slot - use a torchlight) is rotating when the print command is given / 'check' button is pressed after the error message.

Customer Replay

roller not moving

Understood you.

If the paper pickup roller does not rotate - a component in the gear train needs attention/replacement.
The gear train is behind the formation inside the right side cover.

Customer Replay

k...thanks

You are welcome!
Thank you for reaching out. Please let me know if you have any other questions and I'll be happy to clarify them for you!

Customer Replay

copy that

Good.

Customer Replay

bye