Comment by acquacow

I just finished completely rebuilding a 2008 and 2010 macbook pro. The older ones are quite serviceable. This round, the speaker surrounds had cracked causing buzzing audio or no audio. I managed to ebay brand new speaker replacements and got them installed. I cleaned everything and re-pasted the CPU/GPU while I was in there as well. They are on El Capitan and High Sierra, but can be patched to be upgraded to Mojave if I wish. Currently running a LTS version of Firefox as my browser.