No sound from ear speaker after repair.
Today I was repairing an iPhone 3GS 32GB.
It was not the first time I had to replace to backcover and the front glass (digitizer).
I replaced the backcover and I replaced the broken frontglass.
When the phone was assembled I powered on.
It worked. Only one thing not.
I don't have sound from the earspeaker.
So I thought it is cable number 3.
But it isn't, because 1) the sensors are working. And 2) I swapped the front panel with another 3GS and on the other 3GS I had sound via the earspeaker. But with the front panel from the other 3GS on my 3GS I didn't had sound.
I really don't know what's broken.
How can it that the earspeaker don't work, and the loudspeaker does and the sensors also.
Has anybody a solution?
Thank you in advance