Sound Goes Up and TV Shuts Off



For about a month now 98% of the time after turning the TV on, the sound will increase in volume, the picture will freeze, and the TV turns itself off.

A few seconds later, the picture comes back on and resumes like nothing happened.

At first it only did this once. Then it increased to doing again about 5 minutes later.

Today it turned off 4 times in a row and restarted itself. Does anyone have a clue as to why and what can be done?

"Sound Goes Up and TV Shuts Off," is about XFinity-Comcast Television.

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