Il Mio Problema
No sound in speakers or earphone
La Mia Riparazione
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!
Il Mio Consiglio
I certainly would advise anyone to use ifixit-- even the Mac tech guy I talked to suggeste . . .