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Xfinity remote volume down turns off my Phillips tv

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Xfinity remote volume down turns off my Phillips tv

My xfinity voice remote has been turning off my Phillips smart tv for awhile now, not all the time just randomly, when I press the volume down button. Started after we got the Phillips tv we had no problems with the box or remote prior. When volume down is depressed it immediately turns off tv then after turning it back on with remote the start up logo shows however the screen stays gray..no sound. When we try to press any buttons on Comcast remote or our Phillips tv remote nothing works. Not a single button is recognized. The cable box is still on too. The only way to get it back is to reset our surge protector button, kills power to everything, then it will turn back on and work normal until the next time volume down is pressed.
Anyone experience similar problem or have any ideas of what can be causing this, any help is greatly appreciated.