Hello there. I have my Macbook Pro for like 1 and half month and so far so good. Yesterday my baby cat took advantage of a distraction of myself and decided to make of my power cord a snack. The computer was plugged in and the power cord seemed to continue to do his job, since the green light kept up and the menu bar status was saying that it was charged. She didn't rip of the cord, but she made some nasty holes on it. Since i was afraid of some sort of short-circuit i turned off the computer and removed the power cord. I went to a Mac representant here and bought another 85w Power Adapter. The thing is, since then i notice some very low noise not in the Magsafe but near it inside the laptop BUT those noises only come when on heavy load, like when demanding lots of work from the dedicated graphic card, or on some heavy file transfers. Its not a typical electrical noise or whistle. Its like the sound of a HDD working but A LOT fainter. You need a very quiet room to hear it. The rest of the time, its very silence... Now, i honestly don't remember how it was with the other power adapter. So i would like to know your opinion if this is normal or has the other Power Adapter burnt something inside, or if this Power Adapter is mal functioning... I have the 2.3ghz 17'' MBP with a SSD. Thank you in advance.