I have purchased a Macbook pro 13inch - which appears to be faulty. Just eliminating any potential problems. Firstly, I want to check the power cable. Should the power cable end light up even if the laptop's logic board is fried? I would assume so, but if not I wont replace the power adapter/cable. I would think it would light up, just at least to show that power is at least going to battery, even if the battery wont charge (posibly a problem). I dont have a second macbook to try the power cable. When the laptop came to me, the lead was very tightly wrapped around the transformer - i know these can go..