I just had the same problem and eventually the whole earbud died, I then just assumed it was the speak so I ordered just the bud I needed off eBay and then just opened both of then up with a pry tool and unplugged the cable connector and swapped out the speaker modules and then it worked(because you can't sync two different earbuds,they are synced by chip) and on the up side you have a spare battery and touchpad button