How do you get your TV signals (Xfinity, Spectrum, Dish, etc.)? Do you have the original instruction manuals for your equipment? For Comcast/Xfinity, there is a way to "pair" the Xfinity remote with the TV and possibly the surround sound system. As for the phone and computer, these typically get paired by Bluetooth, so were these previously paired? I have just recently had significant problems with new hearing aids that interfered with the operation of my phone in the car.
My point you may want to provide some more information so that someone can help, otherwise I would suggest Bob's TV as a start. I would volunteer to help, but I need more info to avoid wasting your time.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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