User's Guide - (Macintosh OS X)

Ink-backup mode
The printer can operate with only one print cartridge installed. For more information,
see Ink-backup mode.
Installation instructions
Show me how to install a print cartridge.
Follow these steps to install a print cartridge:
1. Press the Power button to turn on the printer.
2. Open the printer cover.
The cradle moves to the center of the printer.
3. Push down on the print cartridge and slide it out of the print cartridge cradle.
1 Press the Power button.
2 Lift the printer cover.
3 Push down on the print cartridge.
4 Slide the print cartridge out of the cradle.
4. Remove the replacement print cartridge from its packaging and carefully remove
the plastic tape. Hold the print cartridge so that the copper strip is on the bottom
and facing toward the printer.
Chapter 9
34 HP Deskjet 3900 series