Tri-color LED with the following functions:

1- Red blinking fast: early startup

2- Red blinking slow: system boot

3- Red solid: 1st stage boot loader

4- Green solid: system up and running (Portal connection established)

5- Green blinking: no internet connection (as well as, briefly during system boot & factory reset)

6- Orange blinking: firmware upgrade in process

7- Orange steady: Operating System failed to load - 
     - reboot the device by pressing the Reset button located on the front panel of the Flex device
       for 3 seconds approximately.