1. Hello Paul, Thank you for contacting HP Total Care. I understand from your email that “Remove and check cartridge on right” error message is displayed on the front panel of your HP Photosmart C4180 All-in-One. I understand your concern and assure you that working together; we should be able to resolve the issue. However, it may take a few e-mail exchanges to resolve the issue completely. Your patience will be appreciated. Paul, I would like to inform you that this issue might occur if the cartridge contacts are dirty or defective. To resolve this issue I request you to on the web link given below and follow the instructions mentioned in the document which might resolve the issue you are experiencing. Note: Error message mentioned in the document is different but the troubleshooting remains the same for both error messages.http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01530839&cc=us&lc=en&dlc=en&product=3192753 NOTE: Clicking the link may give an error indicating it is invalid. If this occurs, copy the portion of the address on the remaining line(s) and paste it at the end of the address showing in your browser until the complete address is displayed in the Address box. If you need further assistance, please reply to this message and we will be happy to assist you further. You may receive an e-mail survey regarding your e-mail support experience. We would appreciate your feedback. For information on keeping your HP and Compaq products up and running, please visit our Web site at: http://www.hp.com/go/totalcare Sincerely, Allan HP Total Care ***Do Not Delete Service Ticket Number*** {ticket no:[8017242946]} ***Do Not Delete Service Ticket Number***