I use my harmony remote to turn on box Xbox One, my AVR, my TV, and my STB (which never actually shuts off because Xfinity … This because the shadow does NOT appear when streaming (e.g. He suggested requesting a new box. OR a DVD from the Blu-ray. (But I won't since I"m ditching Xfinity and going to YouTube TV) While I can access all my other apps, netflix, hulu etc., when I try to access the xfinity app It shows me the guide listing of all the channels available and when I click on a specific program it does show me the explanation of what the program is but when a push the watch button all I get is a black screen. If you consistently see a blank screen and you can pull up the Control Center menu on Xfinity when powering up the Control Center, please try the following steps: Disable Standby on Xfinity (Settings > Device Settings > Power Preferences > Power Saver Starts After [Set this to "Off"]) Xfinity For full functionality of this site it is necessary to enable JavaScript. Black bars get added -- to the sides or top and bottom of the screen -- so the TV show or movie can fit on your TV without bring cropped or stretched. If the entire screen goes black then I can guess that it is your HDMI cable (cable connect the box to the television) that has gone bad. NOTE: Some troubleshooting steps may be different from your (Samsung, SONY, LG, Hisense, TCL, VIZIO) TV or remote control but generally will work the same to fix the problem. Cables may not … How To Fix A Blinking Or Flickering TV – TURN TV OFF TO RESET Read More » I have one DVR box and one TV box. A component attached to the TV could be at fault. Regarding the shadow on the top 1/4 of the screen, he agreed with the source of the problem being the Xfinity HD box. I just moved and am required to get Comcast/Xfinity. A flickering TV that blinks can sometimes be fixed by simply turning the TV off and back on. This dimming TV screen effect can seem like a strobe light and show flashes of black. With this new Xfinity box I keep getting black screens when I boot up the system. Comcast Customer Service is here to provide Help and Support for your XFINITY® Internet, TV, Voice, Home and other services. The Xfinity Flex streaming box and remote is aimed at Comcast’s internet-only subscribers who want to watch video on the big screen. FIX TV SCREEN THAT RANDOMLY GOES BLACK. ... It’s similar to devices such as Roku or Fire TV… Netflix; Amazon, etc.) There’s a bliss when you watch your favorite TV show or movie on your digital cable TV C o mcast Xfinity with high quality and flawless audio. 1. Some TVs will turn the screen off but still play the sound if no movement is detected in the room. Check that POWER SAVER/ENERGY SAVE MODE is set to OFF. It started working the - 3391848 I upgraded my equipment to XB7. 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