Check that the power cable is connected to the set-top box.
Check that the set-top box is connected directly to the fiber modem using a network cable.
If you are using your own wireless router, check that the set-top box is connected directly to the wireless router using a network cable.
If your set-top box uses a smart card, make sure the card is inserted correctly.
Check that the set-top box is connected to the TV, and that the TV is set to the correct input source (HDMI‑1, HDMI‑2, etc.).
Try connecting the set-top box to a different network port on the fiber modem / wireless router. We have seen cases where switching to another network port resolves the issue.
Try unplugging the power cable from the set-top box, wait 10 seconds, and plug it back in. Sometimes the set-top box can freeze, and a restart can solve the problem.
Check that the network cable has not been damaged - for example, bent sharply or pinched in a door/window.
Note: If you have made your own network cable (self‑terminated cable), we recommend testing with the network cable that came with the set-top box.