New answers tagged nikon-d5100
I don't think I've tried it with your exact camera, but maybe give this a look? http://www.sofortbildapp.com The issue with live view on a computer while taking a picture from the camera is the computer has to be in control of the shutter and sensor in order to do live view. For the camera to re-override that override would be some interesting ...
It's due to the dust that has blocked the shutter curtains. Dismantle and cleaning should help the camera recover.
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