The lcd on my macbook A1278 was giving me black spots unless I put a bit of pressure (pushed with my finger) on the screen. I decided to replace it. Now when I turn on the Macbook, I get a chime, and orange light on the magsafe adapter, no light on the power button, and I can see the backlight on the screen turn on, but still just a completely black screen. I have checked both cables coming from the LCD screen and they are on tight. I also did a PRAM reset 3 times. Any other ideas?? Oh, and just in case I got a faulty screen I tried installing the original screen. I'm now getting the same issue with the original screen.