FYI - this may be old news to some here, but I just got this today via email - I haven't yet had any problems with my set, but I know others have - this might help...
Notice Regarding Sony Bravia LCD TV Models KDL52Z5100 and KDL52XBR9
Dear Valued Customer:
Sony has identified a limited number of 52” BRAVIA LCD televisions (Affected Models listed above) which may develop picture anomalies on the screen related to the LCD panel.
As part of our commitment to quality, under the terms of the limited warranty included with the product, Sony will replace or exchange the panel or television for any Affected Model experiencing picture anomalies due to LCD panel failure through March 31, 2014. Please note that except as set forth in this announcement the terms of the Sony limited warranty for these products continue to apply.
In addition, customers who paid out of pocket to repair the LCD panel due to picture anomalies on one of the Affected Models prior to the date of this announcement may be eligible to be reimbursed by mail for parts and labor expenses. To receive reimbursement, please complete and submit the reimbursement claim form that can be found at http://esupport.sony.com/US/p/support-info.pl?info_id=1141
; all claims must be postmarked by November 30, 2012. See claim form for complete terms and conditions.
Please contact Sony at (888) 649-7669 if you own one of the Affected Models, and believe that your television is experiencing the symptoms as specified above. If a panel failure is confirmed, the appropriate arrangements will be made to address the issue.
Tim Brison, Senior Vice President
Post-Sales Support and Promotions
Sony Electronics, Inc.