crwdns2934241:0crwdne2934241:0 mocan55

crwdns2934249:0crwdne2934249:0:

I had the same problem.  I took the mainboard out of the phone and soaked the top part in 91% rubbing alcohol overnight. Took it out in the morning and scrubbed the corrosion off with a brush.  Speaker works great.

crwdns2915684:0crwdne2915684:0:

open