New Chromecast not starting with Set Up Prompt

[Kimbyya]

I just purchased a new Chromecast. I have plugged everything in and from what I have read, there is suppose to be a “Set me up” prompt on my television, but instead it says "Not Support". Can you help me solve this problem or is the chromecast defective?

[Ashepherdson]

Sorry it must say more than just not support.. it is possible it says resolution not supported ?  What type of TV are you using ? Have you tried a different HDMI port?  

[Kimbyya]

Yes, I've tried different ports.  I have a 42" Vizio.  Up to this point, I've used a Roku stick which works fine with this TV.    I've installed this same Chromecast on my 3rd floor TV with no problems, so I'm guessing it's defective.

Thanks for your help.

[Kimbyya]

I already tried all of those things.  I've already returned it and got a new one. Thanks for trying to help!