To set up a new HP printer, the most straightforward method is to download and install the HP Smart app on your smartphone, tablet, or computer, then use it to connect your printer to your Wi-Fi network and complete the installation. Start by powering on your printer, open the HP Smart app, select “Add your first printer,” and follow the prompts to find and connect your printer. If your printer doesn’t appear, hold down the Wi-Fi button and the Red X button simultaneously until the power light flashes to enable connectivity[1][3].

For a computer setup, after downloading HP Smart, you can run the setup wizard to search for printers, connect your new printer to Wi-Fi, and complete the installation. If your printer is not detected automatically during this process, the setup provides options to manually connect the printer to your wireless network[2].

In short, steps include:
1. Power on the HP printer and place it near your Wi-Fi router.
2. Download and open the HP Smart app (available for iOS, Android, Windows, macOS).
3. Use the app to find your printer and connect it to your Wi-Fi network.
4. Follow the on-screen instructions to finish installing the printer and print a test page[1][2][3].