Tv turns off when I first turn it on

Question

The tv turns off by itself and the remote will not interact with the tv or the tv does not receive signals when it goes off by itself. I disconnect power as a reboot and it will come back on, but then it will shut off again. I do this several times before the tv decides to stay on. Also the picture is also greenish and not as bright as before this problem began. Right before the tv turns off, the screen becomes green with horizontal lines before it turns itself off.