Hello @RameshPadma ,

If your router is no power at all, here are some suggestions:

1) Try another power socket. Ensure that the router is connected to a stable power source. 
2) Try a different power adapter. 
3) Hard reset the router by using a pin to press and hold the reset hole till all lights come up momentarily. 

If the above suggestions do not resolve your concerns, please contact local support for further instructions.