My 2008 MBP 2.4Ghz had a failed logic board. Turning it on only gave me a click (not really a click) sound and the sleep light came on for a couple seconds. (So, I was sure it was the logic board, not the video chip.) I figured I had nothing to lose to try to reflow the board myself. If I sent it off to be done for $400, I was concerned the problem would happen again down the road. Same thought on buying a used board. I read the posts on the 'net about baking it in the oven and hitting it with a heat gun. I choose the heat gun method. After removing the logic board, I used a "craft store" heat gun (which my wife uses for embossing text/art on greeting cards) and slowly began heating up the board. For a minute or 2, I held the gun about 10" away and warmed it up, gradually moving it closer (3" - 5") and waving it around the entire board, both sides, mostly aimed at the processor chips. I did NOT use a thermometer. I just went by touch to guess if it the temperature was too hot. I did this for only 5 minutes and let it cool down. Dropped it back into the MBP (without inserting the screws yet), turned it on and it fired right up! I'm going to apply some new thermal paste before I put it completely back together. I'll report back later after it's all back together.