Do I need to disconnect my Ethernet cable when setting up Wi-Fi on the HP DeskJet 2700?
No, you do not need to disconnect the Ethernet cable. If your computer is connected by Ethernet, simply turn on the computer's Wi-Fi while setting up the printer, and the Ethernet connection can remain in place. (Page 3)
From the official HP Deskjet 2700 All-in-One Printer manual, page 3
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