I just got a refurbished macbook pro retina 15" on saturday. It is so beautiful! However.... One problem started today. It's like a tick sound from the left specker but very short and stop and come back again in like 45 mins It only makes a tick sound 4 times, "tick tick tick tick" (always) and gone. There are no any other problems beside the tick noise. Should i return it for the 14 days policy?