HP Deskjet 1280 - User Guide
Page 15
... the print cartridge. Visit http://www.hp.com/support/dj1280 to download the software. You have administrator privileges to the electrical contacts, you can be downloaded from within your DOS application's printer driver. 2 Clean the electrical contacts on the print cartridge cradle with a dry, lint-free cloth. Installing other software HP Deskjet Control Panel for their DOS applications.
... the print cartridge. Visit http://www.hp.com/support/dj1280 to download the software. You have administrator privileges to the electrical contacts, you can be downloaded from within your DOS application's printer driver. 2 Clean the electrical contacts on the print cartridge cradle with a dry, lint-free cloth. Installing other software HP Deskjet Control Panel for their DOS applications.