Einleitung
I phoned D-Link tech support several times, and they eventually concluded my device was broken, but I got it fixed.
My D-Link dhp w306av would do nothing but blink it's blue (WPS/ENY) LED. None of the support people could fix it with any kind of reset. This is what I managed to do.
Werkzeuge
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            Take a pin or micro screwdriver and push in and hold the reset button. 
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            Still holding the reset button plug the router into a power outlet. 
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            Keep holding down the reset button for at least 15 seconds. 
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            Now you can go back to your quick install guide that came with the router and set it up again. 
 
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                            Abschluss
                          
                          hope it works for you