HP Deskjet 3420 Color Inkjet Printer - Manual (Page 12)

power button and light
Press the Power button to turn the printer on or off. It may take a few seconds for the
printer to turn on after pressing the Power button.
1. Power button
Caution! Always use the Power button on the front of the printer to turn the printer on
or off. Using a power strip, surge protector, or a wall-mounted switch to turn the printer
on or off may cause printer failure.
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