After replacing headphone jack board cameras do not work?

As mentioned i have had to replace a faulty headphone jack assembly. However after refitting the new board both cameras have stopped working!

I have tried other cameras but still the same and put in original board the same.

This has happened before i only resolved by fitting a used board from a breaker.

Any ideas?

Thanks

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I have the problem with wake/sleep, mute, up/down speaker volume control. replaced a broken digitizer and these buttons simply quit. Replaced the button assembly. Volume up/down did work and it quit too. Is there something very delicate about the ribbons?

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