Reset the wireless settings by pressing both the Cancel and Wireless buttons together for 3 seconds, till the power light starts blinking, then follow the HP Smart app to reconfigure the wireless connection.
See 'Connect a printer that does not have a touchscreen control panel >Step 2: Connect the printer with the HP Smart app' below the steps to reconfigure it:
You may also use WPS instead if your router supports it, to enter the printer into WPS PIN Code, press and hold the Wireless and Information buttons for 5 seconds, till the power light starts blinking, and type the printed WPS PIN on your router EWS Page.
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