Part Type: DF4 Mount DF4 Board Part Number: A-1253-587-B MFR Part Number 1: Sony A-1253-587-B (A1253587B) MFR Part Number 2: Sony A-1253-587-A (A1253587A) Board Number(s): 1-873-818-12 1-873-818-11 Known Models: SONY KDL-52S5100 KDL-52W3000 KDL-52WL130 KDL-52WL135 KDL-52XBR4 KDL-52XBR5