My entertainment center has a flat top for my TV, and a space in the upper right corner where I put my receiver. After putting my new H/K AVR 325 in this spot I noticed the corner of the display turned green where it sits over the H/K. I've since moved them away from each other, but now the TV is 'off center' from the seating area. Can anyone suggest what I can get to put beneath the TV that will shield it from the H/K? Thanks.