The small lights on the router indicate about the state of the router. You can know that the router is working properly if all the lights are blinking. If Spectrum router no lights, then there is some error with the router. First, check whether all the cables and wires are properly plugged in the electric socket. It can also means that the router needs a firmware upgrade. Upgrade the firmware of the router. Reboot the router is it still doesn’t work. Temporarily disconnect all the devices plugged in from the router. Resetting the modem is the last solution.