I HAVE PROBLEMS CONECTING MY MB PRO WITH MY INSIGNIA TV

HI EVERYONE.
I HAVE A MACBOOK PRO THAT JUST BOUTH AND I WANT TO CONECT IT WITH MY INSIGNIA 24 INCHES TV THAT I HAVE.
I ALREADY HAVE THE "Dynex DX-AP160 - Video / audio adapter - DisplayPort / HDMI - mini-DisplayPort (M) - 19 pin HDMI" TO CONECT THEM.
THE PROBLEM IS, WHEN I CONECT THE HDMI CABLE WITH THE LAPTOP.....IT DOESN'T WORK.
THE TV SCREEN SAYS "NO SIGNAL" AND THE LAPTOP SCREEN ONLY GETS BLUE LIKE 2 SECONDS JUST WHEN I CONECT THE CABLE IN IT.
PLEASE, IF SOMEBODY COULD HELP ME, I'LL BE VERY GRATEFUL.

NO, I HAVEN'T TRIED OTHER CABLES... BUT I'VE BEEN READING THAT IS GOOD TO USE THIS CONECTOR: Kanex iAdapt 51 Mini DisplayPort to HDMI with 5.1 Channel Digital Audio, BECAUSE WITH THE OTHER ONE YOU CAN'T GET THE AUDIO.
THE PROBLEM IS THAT I BOUGHT THAT DYNEX BY AMAZON AND I'M NOT SURE THAT THEY GIVE ME MY MONEY BACK.
ANYWAY...THANK YOU FOR YOUR HELP

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