I have a 2008 Macbook Pro Model. I do not have the exact specs with me at the moment but I will be willing to post it later if anyone needs it. I can hear the start up sound but the screen is completely black. There is no chime and nothing else on the screen. I have read that some of the 2008 models have had graphic card problems with the GT 8600 Nvidia models, however, it has been almost 4 years since I bought my mac. Can anyone provide any advice on how to fix this? Or can anyone confirm that it is the graphics card?