HP Printer 8500A paper jam error when there is none.

[ChristyMac69]

I have an HP OfficeJet 8500A printer that keeps trying to align the print heads.  After printing some pages it throws a paper jam error.  I have searched this printer all over and there are no paper jams.  Yet it restarts with trying to align the printheads and throws a paper jam.  I have unplugged it from all sources and rechecked everything. Nothing seems to work. I have not cleaned the rollers yet.  I am out of air so was going to go get some to see if this helps,

[Valsimot]

Check if you have a broken gear that is very common on 8500 series

https://h30434.www3.hp.com/t5/Printers-Archive-Read-Only/Paper-Jam-error-message-due-to-broken-gear-... 

[ChristyMac69]

I looked and nothing seems to be broken. It is very dusty inside would that cause this error?

[ChristyMac69]

I did but nothing seems to be broken. Will dust cause this error?

[Valsimot]

It depends, the dust can affect an optical sensor to wrongly read position making a false paper jam.