Have had a MEOS 15.4 12v TV given to me back that hasn't been used for a few years. DVD works OK but however I try cannot get it to pick up any channels-keeps coming up with "database empty" .Had the house aerial on to check if it was that but same problem.If I set it to search it will go through the system and come up with !database empty" .Could it be that it is not DTV suitable?