HP LaserJet 1012

To print a configuration page from the LaserJet 1012, press and hold the green button for about seven seconds or so, until the lights start to flash.  Once you see the lights flash, let go of the button.  The configuration page will print out, with the printer's page count on it.  If you hold down the green button but let go before the lights flash, you'll get a demo page instead of the config page.