661-4984 Apple IMAC AIO 20" Intel Motherboard s478, 31PICMB00E0, 31PICMB0040, A1224, 820-2347-A, MB417LL/A 661-4984 Brand New and Factory Tested Genuine Apple Product Part Number is Specific; make sure that you require this exact part number by matching it to your previous motherboard APPLE IMAC 20" LOGIC BOARD 2.66GHZ A1224 661-5136 661-4984 This product includes:20" iMac Intel Core 2 Duo 2.66GHz (Early 2009) Logicboard.works in: iMac intel 20" (A1224-Early 2009-MB417LL) only.Apple part#661-4984/661-5136.EEE Code: 29X,7Y0,7Y1.90 days usedmac warranty