HP Deskjet 3420 Color Inkjet Printer - Manual (Page 65)

6. Insert the print cartridges and close the printer’s top cover.
7. Connect the power cord to the back of the printer.
8. Press the Power button to turn on the printer.
9. Open the HP Inkjet Utility , select the Calibrate panel, then click the Align
button.
10. Repeat the cleaning procedure if ink streaks continue to appear on printed
pages.
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