As a poor college student, I was pretty happy to come into a 20" Aluminum Cinema Display despite the fact that it doesn't turn on. After replacing the power supply, the process of elimination points to the only other possibility being the main board. Unfortunately, Apple being the wonderful parts-cartel it is, has limited the availability of said object. If anyone has this part or can pull it from a display with a broken screen or some other defect not related to the board, I would quite happily buy it off of them.
Price would vary based on how assured I can be about the board. Please help :) !