Reply to John Baker's Post: It is under limited warranty after 90 days. I would like to see if this is a common problem before I have to lug this very large TV to an "authorized Service center." It happens sporadically, but suddenly, spontaneously the screen goes black as if the picture has contracted hoizontally, into an, almost imperceptible, thin line. The sound remains and within the thin horizontal line you can see the moving lights of the broadcast still occurring. often, if I turn the set off and back on, it returns to normal only to occur later.