Problems with xfx Radeon 6770 connecting to my TV.

I just got my xfx AMD radeon 6770 and installed it just recently. However, when I connect my HDMI to my Dynex 26" inch tv , it doesn't seem to display anything. It'll show the starting up pc screen, then itll turn black afterwards. But when I tried it with my parent's 46" tv, and it works fine. Help please.
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More about problems radeon 6770 connecting
  1. What is the native resolution of the Dynex 26" inch TV?

    What is the native resolution of your parents' 46" TV?

    At least provide the model number of both display panels.
  2. the native resolution for the dynex 26" is 1280 x 720

    and the 46" is 1920 x 1080
  3. What is the resolution of your computer monitor?

    Are you cloning the image on your computer monitor to the Dynex 26" TV?

    Try setting them up in the CCC as two independent displays each with the appropriate resolution.
  4. right now my computer monitor is the 46" tv. I don't know how to set up CCC so that i can set the appropriate resolution on my 26"
  5. Try switching the display resolution to 1280 x 720 before switching the HDMI cable over to the 26" Dynex TV.
  6. I did, and it still wont work.
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