Small Kinda Dark Spot on my VIZIO tv?

right under the V on the vizio logo on my 47'' 1080p 120hz class E lcd tv there is a dark spot. when i look at it above it it is really dark and blocks the picture. when i look at it straight in front of me i can barely see it but it does really stick out when the screen is white. its only about 1 inch by 1 inch. what should i do? i did get the 2 year service plan for it from walmart. should i take it back and say theres something wrong with the screen or will they plug it in and look at it themselves?? just wondering what i should do because the little black spot is really annoying me because its not supposed to be there. lol

Thanks,

Matt