Reboot your STB. If that doesn't help? Check that the white coax cable connected to the STB is firmly connected, if not, tighten it then reboot the STB again.
Still having no luck? Either wait up to three days for a Forum Team member here to respond to your topic here. Or call in and report a TV fault. Or even ask for support via the Webchat: TV -> Loss of my TV service -> Chat online. Note: Access this page from a desktop or laptop. Between 8AM to 8PM M-Sa. All agents busy? reload the page every three minutes and check again.
Edit: Forgot to include my little forum team logo
- - - - - - Any opinions expressed by myself are entirely my own and do not represent Virgin Media in any way.