my TV shuts off after several seconds?

There is a likelihood that the TV is behaving this way because it overheats after running for a long time. However, it is important that you take it to a qualified technician to check it, because there may be other components that are malfunctioning; hence, need immediate repair.
I recommend you this tech service , www.tvrepairjacksonvillefl.com , GOOD LUCK!

ernest
November 2012