Monday, October 21, 2019
HP Deskjet 812C self test page
Dayen | Monday, October 21, 2019
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.
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