I bought my Samsung UN55D7000 new on black Friday in 2011. It has worked perfect until recently and is a great television. Just recently, after no settings changes of any kind, I started have an odd IR issue. I can no longer turn it on with the remote. I can still turn it off, change sources, etc but not turn it on. At first I thought it was an issue with the Logitech Harmony I was using, but I am having the same issue with the factory Samsung remote and my AT&T Uverse remote as well. Just recently I discovered that it I turn it off and immediately back on, it will work. However, if I turn it off and leave it off for more than a few seconds, it won't come back on. Has anybody had a similar issue? I called Samsung report and they said I need to contact someone to replace the IR sensor on the television. I don't see how my IR sensor could be malfunctioning only for "power ON". If it is the sensor, does anyone know where I can buy one? I'm capable of changing it myself.