PT-43LC14 43 in.... Problem

My Lamp blew out. I replaced it. I cleaned out the back of the tv with Vaacum and forced air. I turned the TV on and it worked....for about 45 seconds and shut off. tried it again and again and again. Every time it shuts off after 45 seconds. It sounds to me like this thermal sensor I hear about. I see the little label that points up to it. The problem... I do not know which one it is and how to get that part..

Any help would be appreciated.