SKU: A1938830A, A-1938-830-A.Board Number s : 188852811, 173434311, A1938821A.Substitute Parts: A1938830B, A-1938-830-B.Compatible Models: Sony XBR55X900A, Sony XBR65X900ANotes: Software update must be completed after install The correct software can be obtained at esupport.sony.comSERIAL NUMBER INFORMATION FOR BAFS BOARD: use A1938830A SERIAL 1800001 1820000 US SERIAL 1820001 1840000 CND FOR BAF2S BOARD: use A1951645A SERIAL 6000001 6010000 US SERIAL 6010001 6600000 US SERIAL 6600001 6610000 CND SERIAL 6610001 6700000 CND SERIAL 7800001 7900000 US