The tv will play for about 30 mins. and then cuts off

The tv will play for about 30 mins. and then cuts off. Let the tv sit for an hour or more and it come back on.When the tv goes out theres a red in the center of the tv.When the tv goes out you can till hear the sound or talking coming from the tv.32'' Digital HDTV Monitor, Converts Standard Analog TV Signals to Digital,Dual Digital 1080i/480p/480i Connection,Pro Picture 3 Stage Video Enhancement,Pro Chip + Progressive Scan Display, 2 Turner PIP with Split Screen,Easy Navigation System,BBE Digital Sound Clarifier,3:2 Pull Down