Hi guys, I recently bought a new 2.4 Alu MacBook as my first Apple computer ever, so I am very new.. I like it very much but last week I realised that there is some "sound" coming from the left side of MacBook, I would describe it as a chirr maybe..? I thought it could be a fan, but this sound goes non stop and it does not have any connection with higher load of the processor or something like this. Is it normal that I can hear that or should I go to the retailer and return it? thank you very much for your help.