How to check my SONY XPERIA RAY Smartphone's Handsfree One Spearker not working?

I have SONY XPERIA RAY Smartphone and Handsfree to listen music with it.

Last two days I have found one problem that its one side Speaker is NOT sounded. I am worried about that possible with circuit or wire will be destroyed so, I have opened up the Circuit attached here. But i will not found any wire will be destroyed.

I have no more idea why one speaker is sounded and not other one.

Can anyone will give solution regarding this problem.

I AM NOT SURE WHETHER I HAVE TO ASK THIS QUESTION HERE OR NOT?

Source: http://electronics.stackexchange.com/questions/83753/how-to-check-my-sony-xperia-ray-smartphones-handsfree-one-spearker-not-working

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