Hey  @Jdlc;

First off, what device do you specifically have?

Secondly, in the Kasa App, are you able to set up the device or see that the device is online?

If you have an additional light strip installed, you may try swapping the controllers to see if the behavior is limited to the LED strip or to the controller itself.

For most models, you can perform a factory reset by unplugging and replugging the AC adapter from the controller 5 times for a soft reset, or 10 times for a hard reset. If one of the reset methods is not working, I would recommend trying the other method.

Lastly, due to how you mention that the lights are dim, I would recommend inspecting the connectors to make sure that all the arrows are aligned on the strip and connector, and that there are no loose connections.