Your extender(s) use lights to communicate.
Hexagon Extender(s)
No light: Normal operation; connected to the network.
Solid blue: Starting up.
Green blink: Update in progress.
Green pulse: Searching for a connection during startup.
White pulse: Connecting to the network.
Red light: Connection failure; needs replacement.
Desk Extender
No light: Normal operation; connected to the network.
Solid green: Starting up.
Green blink: Update in progress.
Blue blink: Connecting to the network.