The picture goes out after about 10m min in use

This fault suggests that you have a bad joint somewhere on the tv. If you feel competent to do so,remove the back and check all lead connections.If secured ok put power on and wait for fault to occur and when it does, listen for any arcing or strange buzzing noises coming from the power supply. If so, there may be a dry solder joint on the power supply. Also check for bulging capacitor tops with possible brown fluid discharge on the central power supply board..If this is present, replace the capacitors..Samsung plasma tvs are prone for this, and if ignored, eventually the tv will not come on at all and keep tripping on and off.