Hello, Thanks for reading this. I am trying to set up another screen for my mac. I have an Insigna 24" 1080p TV. I have the Mini Display adapter as well. I plugged all that in and at first the MAC screen flash blue for a few second and goes back to normal my TV screen goes back to NO SIGNAL. I opened the display menu in the preference and no arragement tab exists there even if the screen is plugged. Any one have an idea of how this could be fixed?