Replaced I/O audio board cable late 2010 Macbook Air
No sound in speakers or earphone
Replaced I/O cable-- easy to do, no problems using instructions from ifixit--
Unfortunetly- it didnt fix the problem! So I am going to replace the I/O board next... wish me luck!
I certainly would advise anyone to use ifixit-- even the Mac tech guy I talked to suggested replacing the cable first-- it is the cheapest place to start!
MacBook Air 11" (Late 2010-Mid 2011) I/O Board Cable
T5 Torx Screwdriver
P5 Pentalobe Screwdriver Retina MacBook Pro and Air