I just received a slight CPU upgrade (AMD, socket 939), and am having problems actually installing it. More specifically, I can't even remove the heatsink. I've never removed one before, so forgive me if there is something I am missing.
I guess pictures are worth a thousand words:
The lever right now is in a locked position, to the right hand side (if you are facing straight at the side which is it on, it appears to the right). To unlock it, you are supposed to life it up, and move it to the left. On the very end of the lever, there is a locking device, which I can't see clearly but appears to be just an open hole on the lever which clips around a tab that sticks out from the retention frame.
I would guess that to unlock it, you would simply unhook the end of the lever from the tab on the retention frame. However, those 3 things on the mobo that look like mini batteries are in the way. Right now, the lever is about 1-2 mm away from each of them.