Hi, I have a MBP Mid2012 (2.9ghz/i7) which had a problem sometime ago and I had to change its motherboard to the 13-inch, 2016, Two Thunderbolt 3 ports (Made by an authorized apple fix store). Now my speakers are not working properly, buzzing and making noises. So I decided to replace from the new one I found on AliExpress. My question is, should I have to look for which motherboard the original or the actual one? After 2 years working fine this problem come out, so I don't think if the new motherboard caused this problem, however I'd like to hear opinions before to buy.