Sister gave me her 2013 macbook pro because she couldnt turn it on. Magsafe adapter is not lighting up at all when plugged in. Tried 3 different OEM magsafe chargers and none light up on her macbook. Chargers work because my wifes laptop uses them and is working fine. I tried SMC reset and unplugging the battery cable to power directly from the charger but it still doesnt do anything or show a light. Does this sound like the DC-in board?