@Udpune 

Hi,

By "resetting the home router name" do you mean you have changed the name of the router's Wi-Fi network (SSID)?

If that was the case, then you'd have a few options to make the extender work again.

1) Change the router's Wi-Fi name (and also the Wi-Fi password) back to what it was previously. Then the RE200 should be able to connect again.

2) If you don't want to change the router name back to what it was before, then I think the easiest way would be to reset the RE200 (from the official user guide: "Use a pin to press and hold the Reset button until all the LEDs flash once to reset the extender") and then set up the RE200 from scratch, just like you did when you originally set up the RE200 after you purchased it.