Internet is fine, multiple devices connected. Turn the TV to either a constantly dropped signal or tonight just a black screen. Sometimes we can't get any cable channels, but Netflix and other streaming apps work fine on the box. Tried a reboot and it cycles through the Welcome screen for a long time before just going black. We have two Ignite boxes and neither is working. When I check the Ignite app it says both boxes are connected to the internet. What gives? Any tips?