Main Xfinity box has no picture or sound

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Cityboy222

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#1
I tried switching it with a smaller slave box and it works but main won’t work wherever I put it. Started when we installed new tv. Nothing else is different. I did notice the main box in its new location needs to have the coax cable connected for the other boxes to work. Doesn’t even need power. I’m using an hdmi cable out to tv and just coax in from wall. Just nothing. Something happened to the box, no clue what.

"Main Xfinity box has no picture or sound," is about XFinity-Comcast Television.

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