After power cut router wifi signal blinks orange colour light after that when I connect laptop to modam internet works but router wifi internet is not working

After power back my router wifi signal is working,but internet connection is not working,so I have to Long press the reset button in router, after that entered into tplinkwifi.net portal to make a...

After power cut my router is not connected to my modem again I have to reset router Everytime after power cut please tell me how to solve it