I have the full Virgin Media Oompf bundle, which includes two V6 boxes.
My primary V6 box in the living room has suddenly stopped playing any OnDemand or Catchup services (except Netflix, which works fine). I can click on the film or tv programme i want to watch and if there is advert, this plays, but the film or tv never starts, i just get a blank screen, no error message.
I've been through the forum, tried restarting the V6 box, switching the mains power off / on and switching off / on the power to the box on the wall, with no success.
My second V6 box in the room upstairs, plays catchup / ondemand without issue.