Similar issue about 2 months ago. When plugging the power in, it seems I introduced the cable at an angle and the pins inside the port caused a short. Fortunately, nothing was irreparably damaged. Had to dissasemble the port, unbend the pins into their correct position, and plugged them in again. Didn't realize that was the problem until I had dissasembled the port and thoroughly checked it, so those were quite a few minutes of panic!