A couple of weeks ago, my 15 rMBP, all of sudden, had this weird noise at the area of the right-handside speaker. The computer still run fine but the noise was very irritating, especially in a quiet night when I usually work. I took it to Apple Store few days ago and they agreed to fix and then send it back to me later. I got the computer today and the noise was still there, like Apple did not do anything at all. In the paper coming back with the computer, Apple said they did change the Logic Board and they claimed the computer passed all the hardware testing. Apparently, this does not do the trick. What should I do in this case? I have to drive 1h30 to the closet apple store. I can live with the noise at the time being, but I know sooner or later I have to bring it to the store again. Do you have any suggestions? Thanks!