what i would highly suggest you do, this is kinda what was said before but:
1. turn your laptop over and remove the bottom panel
2. locate your fan
3. remove your fan then clean it
4. this is very important, there should be a copper bar connected to some fins. (the fins were behind your fan)
5. remove that copper bar by removing the four screws holding it to your mother-board
6. look to see if there is any burn marks, scratches, or any imperfections on the copper bar and the metal fins
7. make sure your processor (located directly below the copper bar) is properly secured. (there should be a small screw like thing you can turn half way to lock it into place)
8. put everything back together except your bottom plate
9. open your laptop, and put your laptop on the back of the screen. so you can see the inside of your laptop.
10. turn it on.
11. leave your computer running for about 10 minutes.
12. come back and put your hand CLOSE but NOT touching the copper bar.
if you can feel ALOT of heat coming from it, then that probably means that you should replace your fan, or the copper bar.
If you dont feel heat coming from it, touch it, and it should be somewhat warm.
then all you have to do is put your bottom panel back on. and you should be good...
that is, if you didnt feel alot of heat coming from the copper bar when you WERE NOT touching it..
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Fans for your laptop are not to expensive, here is the cheapest one i found:
http://www.amazon.com/HP-Pavilion-DV6-1 ... B005TTKBQUIf you need the coolant bar, it depends on if it hallow or if its solid. i would suggest looking on amazon, Ebay, or your local PC shop