Why does my Mitsubishi WD 65831 shut off?

I have a Mitsubishi WD 65831 TV. I have had this annoying problem with it, and that is that sometimes it shuts off. It says "TV will turn off in a few minutes, please check airflow in back". This can happen even when I just turn it on (within 2 minutes) and I have an extra fan in the back drawing air OUT OF the tv.... show more I have a Mitsubishi WD 65831 TV. I have had this annoying problem with it, and that is that sometimes it shuts off. It says "TV will turn off in a few minutes, please check airflow in back". This can happen even when I just turn it on (within 2 minutes) and I have an extra fan in the back drawing air OUT OF the tv. Plenty of space behind unit for airflow. Did I mention the room temperature being around 60F. Any solutions will be greatly appreciated. Thank you!
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