The correct signal source is not selected.
If the correct signal source is not selected, the TV will not be able to display the set-top box picture. Solution: Check whether to switch the corresponding connection mode. When connecting the AV cable, select [AV] or [Video] as the TV signal source; When the component line is linked, the TV signal source selects [Component]; After connecting the HDMI cable, select [HDMI] as the TV signal source.
Light cat LAN2 port is not connected.
When the set-top box is not connected to the LAN2 port, it cannot access the network. Solution: Connect the set-top box directly to the LAN2 port of the optical cat through the network cable (the port on the optical cat is marked).