I have a dell inspiron n5010 laptop. i switch on my laptop It boots into windows and after a 20-30 seconds it switches off with a increasing its fan sound. Not shut down but off completely. Also I tried resseting my BIOS but While I was in my BIOS my laptop again switched in same way above. no idea why is this happening. I remove my hdd , replas ram clean the fan but it is stil not warking. I switches on completely for 10-20 seconds and then switches of with increasing fan speed and sound.