Hi,
To perform a resetting function, first, connect the extender to the power supply. Check if the power LED on the extender turns green or not. If not, then wait for a while.
On the bottom of the extender, you will find a pinhole button. This is nothing but a reset button. You need to use a pen tip or paperclip to press the button. Keep the button pressed for at least 10 seconds. You will find the LED on extender start changing its color to orange or blue.
After this, the D-link extender will come to its factory settings. If you still find the problem, you can go to the support page. Setting up the process for the D-link extender is same as that of D-link router.
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