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Very recently, the screen of my Sony 46XBR4 developed large black areas during about 15 minutes of warm up. After about 15 minutes, it worked perfectly.

On the Sony web site there is a page under “Sony eSupport - KDL-46XBR4 - News & Alerts” (http://esupport.sony.com/US/perl/new...&mdl=KDL46XBR4) that seemed to apply. I called Sony at 888-649-7669. They confirmed that an extended warranty covers my set until October 31, 2012. They led me to a local service shop who ordered a replacement panel that was installed at my home, at no expense to me, within 1½ weeks of my call to Sony. The set works great again. Photos showing the problem and the replaced panel before removing the retained electronics are attached. Thanks, Sony.
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