820-1889-A 661-3963 Logic Board 1.83 GHz for MacBook 13-inch MA254LL A1181 NB-4984W This is a MacBook 13" Core Duo 1.83 GHZ logic board replacement. This is a pull from a working unit and comes with our standard 1 year warranty. This will work in both the black and white MacBook 13" units. This will NOT work in a Core 2 Duo unit, only the CoreDuo. EEE code: V3G,VZ0