Just upgraded gateway and touch screen will not connect to wifi.

A week ago I  upgraded to the new gateway and extender but my home touch screen will not connect.  I have rebooted the touch screen several times via myself and Xfinity Assistant but the touch screen will not connect.  I have not been able to use my home security for the last week. Each time I open the Xfinity home app on my phone I get the message "Your Touchscreen has lost power.  Check to be sure  your Touchscreen is plugged in....." 

Screen is plugged in and has power.  Gateway is functioning, all other peripherals, TV, Mobile Phones, computers, are connected to its wifi.