Restore the network settings on the control panel of your Envy 7155 printer.
Tap the Wireless icon and then press the Settings option.
Choose the Restore Network Settings option and then tap the Yes button.
Reboot the Envy 7155 printer, computer, and the network router.
Power Off the Personal Computer, wireless router, and the HP Envy 7155 printer.
Wait for approximately sixty to seventy seconds.
Switch On the network router first and do not proceed until all the lights on it gets stabilized.
Find the Power button on your Envy 7155 printer and then wait for the device to get configured.
Power On your system and then verify if the wireless connection error has been rectified.
Run the Wireless Setup Wizard, go to the Network window on the operation panel of your printer.
Else, tap the Wireless icon on the printer’s front panel and then navigate to the Settings menu.
Choose the Wireless Setup Wizard and then perform the directions that display on the screen to link the Envy 7155 printer to the wireless network. If the problem still exists, try assigning a static IP address for your Envy 7155 printer.
Print a Network Configuration report on the printer’s control panel.
Open the dashboard by swiping down the tab present at the bottom of the screen.
Touch the Setup icon an tap Reports, and then press the Network Configuration Page option.
Look for the IP address of your Envy 7155 printer on the Network Configuration report.
Open any browser and type the IP address in the search bar, and then tap the Enter button.
Navigate to the Network menu and select the Networking option on the left panel.
Click Network Address -> Manual IP Address -> Manual DNS Server.
Type the primary and secondary Manual DNS server on the Manual DNS Server field and click the Apply button.
Printer setup Blog 