X1-DVR Box Pixelation

We had maintenance in the neighborhood last Thursday 6/27.  The maintenance took down our services for about 6 hours or so, which isn't bad.  But when it came back up our TV in the living room has had pixelation issues.  No other TV/Box has that issue in the house.  I've restarted our box, sent system refreshes via the troubleshooting and restarted our router to no avail.

I've got a tech coming out tomorrow.   But just thought I'd ask here on the forums about something that I've seen happen.

When I unplug or restart my xFi Gateway, the pixelation on our TV stops, like immediately.  Once the gateway is back up, it pixelation comes back right away.

Is there anything I can do here to correct this, or is it best to have the tech look?