Part Type: IP2 Baord Backlight Inverter Inverter Board Power Supply Unit Part Number: A-1660-728-C Sony A-1660-728-A Sony A-1660-728-B Sony A-1660-729-C Board Number(s): 1-878-599-11 Substitute Parts: A-1660-729-C Known Models: SONY KDL-46W5810 KDL-46W5500 KDL-46V5500 KDL-46S504 KDL-46V5100 KDL-46S4100 KDL-46S5100