that still doesn't mean anything. see the heatsinks are there to pull the heat and if they are cool to the touch then they aren't doing there job. but u need to send the computer in honestly if thats not it then it's to much of a probelm really to fix over the net. you need someone to come look at it are at least send it in. now for aruguments sake lets say that the sinks were both connected and working fine. Then that would mean that something is still gettting 200 degress so we just overlooked it. I wouldn't think it was faulty sensor like that. I would only think it was an issue if your computer had a problem which it does which leads me to think that the sensor is ok. Honestly you need to send it back in. there is no way around this.