I bought an Infinity Entra 2 center speaker re-manufactured off ebay. I put it on top of my sharp 32" flat screen, and after about 6 months, I noticed 2 bright lines underneath, slightly to the outside of where the woofers in my center speaker. They went all the way to the bottom of the tv's pic, and the burn-in never healed. I never noticed any discoloration on the tv and couple of times, when I first got the speaker, it sent horizontal lines down my tv when a scene got loud. Does this sound like burn-in from the center speaker? My front speakers(crappy panasonic htib speakers, supposedly shielded, not too sure however)were at one point about 4" from my tv, but then I moved them to about 15" to 20" away because I thought I may have seen a little discoloration.