Hey guys, I recently had the problem that my old charger did not work anymore on my macbook pro 2010. I just assumed that it was old, so I bought a new one. Unfortunately the new one does not work anymore, but only occasionally. The macbook doesn't recognize the charger at all. I really don't know what to do. Should I buy a new one? I don't have any guarantee from apple anymore, the charger I bought was from ebay.