Replaced LCD, now no wifi or camera

Wifi is not greyed out and acts like it's looking, but there are about 10 networks to discover here, none of which it is finding.

Front and rear cameras are both black - if I try to take a picture, the app crashes.

Flash and cellular/data are OK.

I am thinking it is a grounding issue although I cleaned the wifi ground clip with alcohol, etc.

I did omit two of the corner screws to secure the LCD to the case as I dropped them in the carpet, however I did not see mention anywhere of these being grounds.

I even tried the freezer trick to no avail.