I had gone through many different ideas as to how to setup a heatsink or heat plate to help dissapate the heat, especially from the northbridge.
As noted above, in one of my recent posts, I had concerns about the wierd redish rubber-like material on the heat plate. Here is a picture, however, the red looks black because of my camera phone (only digi cam on me - sry):
My original plan was to take a (RAM) heatsink and machine it to smaller specs. You can see my heatsink in the middle of machining here:
After machining the top of the heatsink, I then machined underneath. I made it so that it could sit on top of the northbridge chip AND the GPU. Since they are not level, it took some measuring and trial an error. In the end I had a good fit. The only problem was, I couldn't mount the heatsink and get it to stay in place. Arhg. So, I decided to scrap that project and move on to another.
This time I decided to use a piece of thin metal, very high quality material. The theory was to get the heat to the copper plate so the heat transfer can take place and the fan can do its job as it needs to. Also, to allow for extra cooling on the northbridge, which we have come to think of as the problem with the fan running. I took the piece of metal, cut it into a shape that was (imo) good for mounting on the GPU, northbridge chip, and also the chip above the GPU. 3 Birds with 1 stone. After cutting the material, I used a vise to make bends in it to ensure that it would sit perfectly. Here is a picture of the metal after most of the bends:
Next I mounted the metal underneath the copper plate (in order to secure it tightly). This mounting also made the other 2 contact points on the other 2 chips secure. I made bends on the ends of the metal to also add additional security to the device. Before mounting, I placed silver thermal compound on each of the contact points (chip meats metal etc). Here is a picture after installing the metal piece and mounting the thinkpad devices back in place:
So that outlines what I did. I do have many more photos (same quality -sry), but I think these show the general steps I took.
Now, for the results:
-Fan noise is still the same.
-CPU temp showing a consistant 2C cooler!
I have some more ideas, and I hope to have this thing apart and be back at it again tomorrow.
If we don't give up, we should be able to find out answers to our questions by the end of this thread. Which not only will help us, but all of the future people who have these problems.