Start by checking that your television is HDCP-compatible (consult your television’s user manual).
Disconnect your terminal. Wait a few seconds, then reconnect it.
Wait 5 minutes, turn on your television first and ensure that you have selected the right source for your terminal connection.
Now turn the terminal back on and try to access the channels again.
To avoid this type of problem, always turn your television on from the right source before turning on the terminal.
If the problem persists, contact Technical Support.