Why can I hear only loudspeaker?

[iMore Question]

Why can I hear only loudspeaker ?

I am able to hear sounds only from my loudspeaker.

Earpiece speaker is silent.

Also headphones are silent when you connect them to the jack connector.

The jack connector seems to be without any response actually.

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I tried to this time:

Facory settings.(of course did not help)

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Changed: the Front Camera and Sensor Cable

Changed: The Earpiece Speaker

Changed: the Dock Connector and Headphone Jack

Nothing helps .

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Seems like on the motherboar is something wrong.

Maybe any chip.

Any ideas ?