One of my favorite features of the AT4 is its ability to change the settings of my TV, to switch it from my cable box signal to the AT4 signal vis HDMI-CEC. Previously, I had to find my TV's remote to change the source. So I was pleasantly surprised when I first turned on my AT4 that my TV just switched itself over. (It was annoying that it then turned off the TV when I turned off the AT4, but I think I've figure out how to prevent that from happening, in my TV's HDMI-CEC settings.) But since getting my AT4, my Samsung 50" Plasma TV (which is about 6 years old) has been turning itself off over and over again. I get home, I turn on my TV (I'm just watching cable and my AT4 is off) and my TV will shut itself off at a random moment. I turn it back on and a minute later, it shuts itself off again. Over and over. I've read online that this could be a problem with the TV itself, maybe a bad circuit board, but I find it a funny coincidence that I just got an AT4 which has the ability to shut off my TV. I have turned off my HDMI-CEC via the TV's settings and the problem has not yet returned. But I think it's too soon to say I've solved the problem. But I thought I would mention this here to report a possible problem with the ATV4. Might it be sending erroneous signals to my TV even when it's off?