I recently purchased 2 deco E4 routers. Irrespective of the settings whether in router mode or access mode I seem to have issues connecting to the routers. Sometimes the main unit startsblinking red, sometimes the 2nd unit blinks red. Sometimes some devices say that the password is incorrect though it is correct. Sometimes the signal is good but I am unable to obtain IP address.

I have tried everything including rebooting/ forgetting the units/ removing and rejsetting up of the units but each time there is a different problem. Firmware is upto date.

Can anyone help with the problem?