The following steps need to be taken in order to check the hardware functionality of an ET6 controller board:
1. Connect the power supply to the board
Overall, 5 LEDs should light up after supplying power to the board.
2. Connect the LAN cable to the board
* The LED near the LAN cable port should light up, indicating that the controller has been connected to the network: Overall, 6 LEDs (with one of them blinking) should be light up at this point.
The hardware troubleshooting for ET6 is now complete. If any of the LEDs are not on after the steps have been completed, their respective components may be damaged and/or not functioning properly.