Try resoldering the connections. If there is nothing "obvious" then...

You can also do the "oven trick". It is used by many people to fixing XBox360's. set the oven to 390F (just above temperature that solder melts at). Throw it in for EXACTLY 8 minutes. Make sure to remove completely from the plastic box surrounding it or it will melt. Do not touch it after the 8 minutes, just turn off oven and open door wide because you may disturb the solder and create more microfractures.

I put mine on a pan and roll up tinfoil into little balls to support it off the pan.

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