I have a 10+ year old plasma TV. It has started to turn off immediately after you turn it on it only makes the sound and then turns off you don’t even see the screen. It is random doesn’t happen all the time coincidentally it started About a month after I had spectrum Internet & Apple TV box installed. The cords look fine. Today after about two hours the TV turned itself off when I was in the other room. Anyone have any input or advice besides buying a new TV , & not a Samsung , which will be the next step? Thanks.