The manual only indicates that you should see a yellow blinking LED. Not sure whether the LED has different blinking speeds. Where do you see that info?
Since you don’t have any other Zigbee-router devices: how many Zigbee devices are currently connected to your Homey Pro and which model do you have? I believe there is a limit to the number of available slots for direct connections to the Homey Pro, so not via another Zigbee-router device (for the newer Homey Pro’s that seems to be 32 devices).
