The LCD screen on my HP OfficeJet 6110 All-In-One displays the following: Open Door Clear Carridge Jam, then Press ENTER Have changed all cartridges, cleaned inside the printer with pressurized air, tried to reset. No Luck

if u r using refilled one then the its normal. use new one & try

I think the message is instructions, as in
(1) open door (2) clear carriage jam (3) press enter
So there is something internal to the printer that makes it think it has a carriage jam, piece of paper under a sensor, dirty or stuck sensor.
If you can't find it using a bright light, try canned air.

sir printer screen showing door open, clear cartrdge jam and then press enter

yes, that is a carriage jam and not paper, the grinding is from the clean station that gets blocked with dried ink and cant move. you need to open the printer and clean the ink off of the clean station so it can clean properly and not cause a carriage jam.

how to open hp Officejet 5110 all in one printer

Make sure you actually opened the rear door and reseated it even if there's no visible jam.
Make sure the front panel is correctly installed.
Try resetting the printer by turning it off, unplugging the data and power cables for a few minutes, then plugging it back in and turning it on.
If you've tried this and followed the steps given by HP in a search of your model for "Carriage stall resolution", available here
you may have to have a tech take a look at it...

The following link to HP's website will give you step by step instructions on how to resolve the carriage jam issue:

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00310245&lc=en&dlc=en&cc=us&lang=en&rule=29041&product=79477


More information regarding resolving issues on your OfficeJet 6110 can be found through this link:

http://h10025.www1.hp.com/ewfrf/wc/solveCategory?lc=en&dlc=en&cc=us&product=79477&lang=en

Clear Carriage Jam and Press ENTER to Continue Message Displays for HP...
Above applies to your printer. Below is a video for a different HP printer but it does show some unusal places where paper can be stuck.

Fixing Carriage Jam HP Photosmart Plus All in One Printer B209a YouTube

Hi,
unplug the power cable without powering the printer off,
press and hold # & 6 on the printer ... while holding these two keys connect the power cord and do not release the keys till the screen turns off. press the power button to turn the printer on ... it ll go through a reset and it ll be working fine, if the issue persists let me know

thanx