I exactly don't know what was the problem. Here is what I did-
I removed the fan and came to know that I have applied too much paste so I cleared all the paste on top and from heatsink.
When I was...

I read all the things on your given link.
And I think I did almost all the things correctly.
There is a green light above power button and small orange light below restart button.
The green light...

My heatsink was very Dusty.
So today I removed it, cleaned it and reapplied thermal paste after cleaning the top of processor. I did pull the leaver to clean but I didn't remove processor.
I...