new sony LCD making clunking sound

[c00lbeans]

I just bought a brand new 46 inch sony bravia kdl 46 v5100. I was pulling it out of the box with all the foam wrapping still on and heard a clunking sound like maybe the power cord bundle was swinging and hitting the side of the tv. I took the foam wrapping off and the cord was secured and not swinging. I then gently rocked the tv back in forth and it keeps making the sound. Its something on the inside near the top center. I put it on its stand and plugged it in. The picture looks great and it doesn't seem to have any problems. Any one else have this problem, or have an LCD that makes sounds while moving them around?