Take VE802T and VE802R as an example.

1. Power LED (Green) 

Lights to indicate that the system is receiving power.

2. Link LED (Orange) 

2.1 Light is static to indicate that the connection to the Transmitter and Receiver units are ok.

2.2 Flashes when there is a problem with the connection.

3. HDMI OUT (Receiver only)

3.1 Light is static HDMI display is normal with HDCP key.

3.2 Flashes when HDMI display is normal withou HDCP key.

3.3 OFF when there is no HDMI signal.