You can print a self-test page from the Deskjet 812C (and many other Deskjet models) that will show the printers serial number, firmware version, and page count. To print the self-test page, hold down the Power button and press the Resume button (the one with the arrow on it) four times, then release the Power button.
Showing posts with label self. Show all posts
Showing posts with label self. Show all posts