@Agapib There are 2 leds, the power led and the signal one. Except the power led, please ensure that the signal led is lit up and solid blue.

@Mzohri_83 Please give me the below details so that we can do more troubleshooting. a. What's the light status of the RE450 and main router when the extender stops working? b. How often it drops...

@RG2000 The default login password is admin, all in lower case. Meanwhile, if you have bound the RE200 to the TP-Link cloud, please use the TP-Link account password to access the web UI. May it help.

@Brausmith Please show us a picture of the bottom label of the actual device. Then please open the kasa app and go to devices page and tab on HS110 and go to energy page. Please show us a screenshot...

@Nowretire What is the led status of the 4 smart plugs? Are you able to turn them on and off locally with the kasa app? Try to reboot them to give it a shot, otherwise, you can reset them manually by...

@Stefoknee What is the model number of your plug? Meanwhile, the default smart plug's wifi is open, no password needed. Instead, we need configure the plug with the main router's wifi password. Best...