The LED on the Linksys ax1800 extender shows different indications according to its state such as the blinking and stability. Each other light has different signs related to the extender’s performance, connectivity, and errors. The first and foremost light which is solid blue states that the extender is powered on and ready for connection. On the contrary, the blinking blue will show that the extender is starting or booting up. Also, it can be a case that the extender is updating its firmware if you see the same blinking blue light. 

The solid orange on the extender will show that the WPS for your Linksys AX1800 setup is successful. Whereas, if you see the blinking orange light, it means the WPS process is overlapping due to any reason. Here, the blinking blue light will denote that the WPS pairing is in progress and trying to make a stable connection. In any case, you see the blinking orange in a normal state, this means the extender is not connected to the router. These are the LED indications that you will see during the extender setup and after the configuration as well. So, keep checking the LED signs while using the extender to know about its performance.