Turned on the the TV this morning and all I got was a “snow screen”. Checked cables and restarted box. Got the “Welcome” screen for about a minute and right back to snow. The remote works the tv just fine(power, volume, etc.) but unresponsive when trying to access anything xfinity, no menu, no channel up/down, nothing - just the welcome screen and then snow after 30-60 seconds. Working fine just yesterday. What happened?