I have a Macbook Pro , Logic board 820-2523-B EMC 2324 and a 3.06 cpu One day it just shut down, and then when trying to reboot would just be stuck on the Apple logo I tried it without battery in , and with battery in. The light is green on the charger. I then decided to change the Heatsink, and now it won't even power on. I am wondering if I should change the DC IN Power Jack Board Cable , or what would you recommend I try next? Should I just get a new Logic board and CPU? Not sure what I should try. Thanks for any help. If you need more info let me know.