An HP printer may not connect to Wi-Fi due to issues such as incorrect Wi-Fi credentials, the printer being connected to a different network than the computer, wireless settings conflicts, or interference from firewalls or antivirus software. Common causes include needing to restart the printer and router, forgetting and reconnecting to the correct Wi-Fi network, or outdated printer drivers[1][4][5].

Key steps to fix this issue are:

– **Restart both the HP printer and the Wi-Fi router**, allowing about 30 seconds before powering them back on to clear any temporary glitches[1][3][4].

– **Verify both printer and computer are connected to the same Wi-Fi network**, ensuring you enter the proper network name (SSID) and password correctly on the printer[1][4].

– **On the printer, reset or restore network settings** via the control panel, then use the Wireless Setup Wizard or WPS button to reconnect to your network[3][4].

– **Forget and reconnect the printer to the Wi-Fi network** if connection attempts fail, making sure the password is accurate[1][5].

– **Check for firewall or antivirus software that might block printer connections**, temporarily disabling them to test and adjusting settings as needed[5].

– **Update or reinstall printer drivers and the HP Smart app** on your computer to ensure software compatibility and correct network setup[4][5].

Additionally, a blinking or off wireless light on the printer often indicates a wireless connectivity problem, while a stable blue light means a successful connection[2]. Following these troubleshooting methods usually restores Wi-Fi connectivity to HP printers.