So i got Macbook Pro Early 2011 13". The battery need to be replace. I'm using an orginal power adapter as a power source. The only way to get this thing turn on is just connecting the power adapter, and when it removed the MacBook turned off. My question is, is it okay to using a power adaptor as power source? it will damaging the logic board? I'm using the mac just for browsing, spotify and Ms. Word only. Thanks before.