Canon Pixma MG2922

Printer/copier with scanning capabilities. Was printing just fine a month or so ago but now it keeps flashing an error message re: the blk ink cartridge. They are not Canon brand, and are still full. I refuse to buy more cartridges but don't want to waste what might otherwise be a solid printer, so if you're willing to fiddle with it, you've got yourself a printer/copier/scanner.