Why won't my Transformer TF300T HDMI not work with my Panasonic??

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http://forum.xda-developers.com – Hello everyone. I tried doing a search on this and got plenty of topics but mainly for phones etc...still trying to learn search in here. Anyway, I purchased a HDMI cable today for me to watch Netflix on my Panasonic plasma tv and lo and behold it doesn't work! I read some where how some people get sound and can only play certain movie players with the exception on Google Movies but tried playing a movie from my memory card and nothing...no sound...no image...not even a flicker. Can anyone help me...I find this quite bizzare! Thanks Sent from my ASUS Transformer Pad TF300T using Tapatalk 2 (HowTos)