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No, other inputs seem to work fine. I have also moved the Vizio and connected to the main Genie receiver with the HDMI Cable and it seems to work fine. Direct TV has changed out the client mini Genie several times and they insist it must be the TV.
What do you mean with "Their may be a cable supply to your home rather than the receiver if they have changed it but definetly not the TV? Direct TV is a satellite supplied provider.