I have a dell inspiron m5040 I bought from someone thats only 3 years old, it was working good then it randomly started turning off. I took it appart, cleaned it out and applied new thermal paste and its still doing it. The cpu fan seems to be running randomly also, I installed cpu temp and its running between 45 and 58 deg c. When thing I noticed is when I have it partially disassembled and running it doesnt seem to do it, but when its fully assembled it shuts off. It has a fresh install of windows 7 and a new hdd. Im going on a tdy next week and would like to get it figured out so I can take it with me. Any help would be greatly appreciated.