Last month our cable box messed up. (We had picture but no sound.) After exchanging it (and replacing the TV) everything worked fine. Until the last few days. Now there is a new problem. Now the TV takes spells blinking totally out. It only lasts a few seconds. But it happens every 10-15 minutes. And it shows Status Code 800 & says something about updating. What's going on? And how do we fix it?