To reconnect your HP printer to your Wi-Fi, the common approach is to use the printer’s Wireless Setup Wizard on its control panel (especially if it has a touchscreen). You navigate to Wireless Settings, select Wireless Setup Wizard, choose your Wi-Fi network from the list, then enter the network password to complete the connection. If your printer lacks this wizard, you can try Wi-Fi Protected Setup (WPS) by pressing the WPS button on your router and then on your printer to connect automatically[1][3].

Alternatively, you can use the HP Smart app on your smartphone or computer:
1. Turn on the printer and ensure the Wi-Fi light is blinking.
2. Open the HP Smart app, select Add Printer.
3. Choose your printer from the list.
4. Follow the app’s on-screen prompts to select your Wi-Fi network and enter the password.
5. When prompted, press the Information button on your printer.
The Wi-Fi light will stop blinking once connected successfully[2].

If your router supports WPS, you can put your printer in WPS mode using the printer’s control panel to connect without entering the password manually[3].

For older or basic models, you may need to connect the printer temporarily via USB to your PC, then use the HP software to configure wireless settings.

Summarized steps:
– On printer: Go to Setup > Network Setup > Wireless Setup Wizard.
– Select your Wi-Fi network name.
– Enter the Wi-Fi password.
– Confirm connection (Wi-Fi light steady or message on screen).
– Or use the HP Smart app to add printer and connect wirelessly.
– Use WPS if supported by router and printer for push-button setup.

If problems persist, restarting your printer, router, and computer and trying connection again often helps[1][2][3][4].