@AvA007 

Hello, try to power cycle it first; then with it plugged into the wall socket, hold the reset hole for 15s and verify whether it works.

If still the same, I'm afraid that there is not much we can do; you can contact the retailer or local tech support to get a replacement if qualified. 

Good day. 

@AvA007 @xemdaga 

Hello, thanks for your reply. 

If the RE450 is still the same and cannot be fixed by the troubleshooting methods mentioned above, there may have something wrong. 

You can contact the retailer or the local tech support with the serial number and proof of purchase to get a replacement if qualified. 

Good day. 

@c00   If power led keeps blinking and will not response to a factory reset, please check if  range extender is still broadcast a WiFi signal, if not, it could be a defective unit. 

So far we did not get any known hardware issue with RE450 range extender, so  it is suggested to contact the local retailer or local support check device warranty for the certain unit. 

RESET: With the extender powered on, use a pin to press the RESET button until most Leds flash once.

If range extender responds to a reset or still brocasts the SSID,  please install it from scratch from web page or Tether app. 

For your question with the password required after WPS process, if the signal LEDs/ Wi-Fi Leds light up after WPS process, that means RE connects to router successfully.

As range extender uses the same security as main router, please put in router's Wi-Fi password to connect to Wi-Fi of range extender.