Why does the viewfinder show no images or poor-quality images?
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Some camera apps may not work correctly when another camera app is running. Exit the current app before starting another.
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You may not be able to use another camera app that uses the built-in camera while using the gesture function.
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The viewfinder may show some noise, for example horizontal streaks, when you are viewing a rapid-moving object. This is normal and does not indicate a malfunction.
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If the problem persists, restart your VAIO computer.