Have a new Buzz box 3000 hooked up to a Vizio TV as an HDMI input. Everytime i select a different input on the TV the box (buzz box) goes in to stand by mode or power down.When i want to watch the buzz box again it takes a few resets to get the port connected again and internet working so as to watch live TV.any ideas is the box defective ? any help will be much appreciated ,thanks