We turn on our Emerson Model LF391EM4F flat screen, (manufactured 2013). The screen shows the Emerson logo, then there's a staticky pop noise and it shuts off.

I tried unplugging it for a bit and plugging it back in. No luck. We've had it for a while, and TVs are dirt cheap now. But here's what seems weird..

I'm teleworking so I have to be on line for work. When I unplugged it, our WiFi stopped. It came back up maybe 5 minutes or so later. Very annoying if you're on a video call. I was pretty sure I hadn't unplugged the cable box or router.

So about an hour later with the family's help we carried up the spare display from the basement and plugged that in. We were very careful to check all the connections and ensure we didn't unplug anything but that TV, and then plugged the other one in, and of course reconnect the HDMI from the cable box. Same thing, WiFi dropped and came back 5 - 10 minutes later.

So, how does the power from the TV affect the WiFi router? The cable connection from Comcast to the router is separate from that of the cable to the channel box. Both are plugged into the same power strip.