My macbook pro wont start after i installed ram?? when i start the laptop, i can hear my superdrive making a clicking noise then it wont start. screen stays black and the little sleep light stays on. its a 2.16 ghz intel core duo macbook pro. about 2 3 years old. im trying to replace the original ram with a patriot sodium 2x2gb pc2-5300 667mhz ram sticks. could it be cause this laptop wont run 4gb of ram? any suggestions?