How do I turn the printer on and off?
Use the power key on the front panel to turn the printer on or off, which is the normal and recommended method. If you plan to store the printer for a long period or the power key does not work, you can unplug the power cord. When powered back on, the printer takes about three minutes to initialize and prepare the printhead.
From the official HP Designjet T520 Printer manual, page 10
Have a follow-up question?
Answers from the official manual.
Common questions