Hp 8500 all-in-one won't clear paper jam message even though there is no paper jam. What do I do. Many have had this same problem. I've tried all solutions listed on the hp forum.

Hello Sande.
Try cancelling the printer job via the control panel in Windows.
Also open covers, including the top flatbed half, to view the paper path.
There may still be a stray piece stuck in there somewhere.
Does this help?
Clive.

Hi, Try pulling out the plug for 1 hour and then try again. Pulling the plug may reset the printer.
Good luck.

This error message is displayed by the printer when paper is jammed in one or more locations. In such a case, users are recommended to remove the jammed paper from the specified location. The entire paper path must be checked for any pieces of paper. To stop the message, open and close the top most cover of the printer. Lastly, verify the flags and the sensors. If the problem persists, the cause of the error message could be a broken sensor or sensor lever.

This error message is displayed by the printer when paper is jammed in one or more locations. In such a case, users are recommended to remove the jammed paper from the specified location. The entire paper path must be checked for any pieces of paper. To stop the message, open and close the top most cover of the printer. Lastly, verify the flags and the sensors. If the problem persists, the cause of the error message could be a broken sensor or sensor lever.

This error message is displayed by the printer when paper is jammed in one or more locations. In such a case, users are recommended to remove the jammed paper from the specified location. The entire paper path must be checked for any pieces of paper. To stop the message, open and close the top most cover of the printer. Lastly, verify the flags and the sensors. If the problem persists, the cause of the error message could be a broken sensor or sensor lever.

An error code showing that there is paper jam alert, but no paper is in anywhere in the machine except in the tray.....I have checked all areas, taken the back carriage of the unit, opened the top and opened the machine. removed the paper tray, everything, but there is no paper stuck in the unit

Constant jam indication. This gear is more than likely the cause after exhausting all other avenues. Also nearly impossible to get to let alone replace even if HP offered the part. There is a black cover over the clutch assy that can be removed to reveal the gear. In most cases the gear is either sitting in the bottom of the machine or split down one side. This is the second machine that I have diagnosed with this problem in a very short time. If you have this broken gear, consider it toast. Matt / E-tech Copier and printer repair.

Did you remove all the transport locks mentioned in your manual or quick setup poster? There may be quite many of them, beginning with a sheet of paper in the drum cartridges, to some plastic pieces here and there, to plastic seal pulls in the toner cartridges.
Do consult the instructions, you may have missed something.

Hello.

In order to solve your problem please read this Article.

'Clear paper jam, then press OK' Message Displays on the All-in-One.Good Luck