Hi. I know this is an older post, but I had just run into this issue on my HP 365. Was running a print, ran out of Cyan. Put new cartridge in and kept getting a message to reseat the C cartridge. I had this happen before and ended up with a technician out who replaced the PIP. This wasn't much more than a year ago, so I called the tech. What he told me blew my mind and saved me a huge headache and hundreds of dollars, so I thought I would share in hopes that it helps someone else out. He had me remove the cartridge in question and then go into my browser on my PC and type in the IP address for my printer, which loaded up the HP Printer control center in my browser. If you don't know how to find your printer's IP address, go the touch panel on your printer and click on Connectivity. In my browser in the HP Printer control center, he had me go to Setup -> Date & Time. He asked me what the date and time was and it said February 13, 2013, and the date I did this on was April 21, 2026. So he had me change it to the correct date and time and made sure I set my printer to the correct time zone. Click apply and then restart the printer. After it restarted, he told me to load the cartridge back into the slot. I couldn't believe it, it friggin' worked. He said it was some sort of glitch that he had run into before, and that a lot of techs don't even know about it. He had actually only just learned of it about 6 months ago, and these printers have been out for almost 10 years. So before you call a tech out for a costly PIP replacement, give this a try. It might save you a bunch of money and time. I actually thought I initially got a cartridge with a bad chip and had driven an hour round trip to my local ink supplier, only to have the second cartridge present the same issue, and this ultimately corrected the problem. So I hope this helps at least one person. Happy printing.