I just reread your post on cleaning the cooling CPU fan. I felt compelled to write this:
The heat seat seating compound must have hardened. You pulled out the CPU with the fan! The first step is to loosing the clamps on the fan, then, gently rotate the fan assembly to separate it from the CPU, it will then separate, and the fan will come out, don't forget to unplug it. You clean or replace the fan, and then you remove the old Heat Sink Compound (it's usually White in color) from the surface of the CPU, and the bottom of the Cooling Fan, making sure that you have grounded yourself to the case, moisture on your finger and touching the case is enough. After you scrape off the old stuff, you do the same thing to the fan, get a new tube of Heat Sink compound, it's really cheap and Radio Shack or any electronics store will have it, and make sure you put a nice even amount, but not so much that it gets messy, I always remove the Fan to make sure the compound has spread evenly, the put it back in, and clamp the fan back in, plug it in and all is good. I have two cats and a dog so this is something I do twice a year. I have found that putting the P.C. on the same level as a chair, or higher reduces the dust in orders of magnitude.
Bottom line, if you see the pins, you have removed the CPU. Stop!! Don't try and push it back in
without releasing the little arm that is supposed to hold it in.
Raise that up, then put the CPU back in, noting the alignment, then re-clamp the little arm, and do what I have described above, and clean the top of the CPU (connected to your unplugged, absolutely no power, not even batteries, if it's a notebook) on the motherboard, never in your hands as those pins just break, and you kill the processor. I hope that helps someone in the future. These tings are easy to build and take apart. That is why I encourage people to build a P.C., as once you have built it, you know how to take it apart, and they are easy to upgrade with extra hard drives, Ram, all kinds of goodies. All motherboards have a separate retention method for holding in the CPU (below is one example). It should never come out with the fan. That means the Heat Compound was of poor quality and solidified, and that your processor was baking.
This is the bar raised, without the CPU installed, all motherboards have some kind of CPU retention method, this is the most common.
