Range Extender is not working

@Vempati  Hello, 

Ensure you have tried a different power socket for the range extender. 

And try a factory reset for it: with RE powered on/ plugged in , use a pin to push the reset hole until most Leds flash once.

May I know was there any thunderstorm or power outage that led to this issue? 

If device still has no power, it is recommended to contact local retailer or lcoal support to check warranty for it:

https://www.tp-link.com/support/contact-technical-support/#Hotline-Support