HP 400 manual Change Cartridge light will continue to blink

7.Push the green top in until the print cartridge snaps into place.

8.Close the printer door.

9.Press the Change Cartridge button again to bring the carriage back home position so that it is ready to print.

Note	Use only a recommended print cartridge. See table 1-5 for the part numbers. If you did not install a
	recommended print cartridge, the print cartridge holder will move back to the loading position, and
	the Change Cartridge light will continue to blink.

Operation and Usage 3-7