I have a MB134ll/a early 2008 a1260 mbp It spins the dvd the white light comes on for 3 seconds or so then cuts off no screen lighting. I took out the 2 ram chips 2gb each samsung and it beeped when powering on without the ram put one at a time in no beeps no boot up. It also charged the battery which only had 3 green lights to full. Do you think I need a new video chip or other part? If I need a video chip what type and model number do I need? I am retired and have the time to try the repair myself but your guidance is much appreciated.