Press wireless button over 20s, until wireless LED button, attention LED and power button LED start blinking, then release wireless button. Before restore network setting, click 'X' button or any other button to wake up printer first.
Let me know if this helps.
If the information I've provided was helpful, give us some reinforcement by clicking the Accepted Solution and Kudos buttons, that'll help us and others see that we've got the answers!
Be alert for scammers posting fake support phone numbers and/or email addresses on the community. If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".