593-1012 922-9141 LCD Temp Sensor Cable - 21.5 inch Late 2009 A1311 3.06-3.33GHz iMac NB-3099W This is a replacement LCD temperature sensor cable for the 21.5-inch iMac. If you are having temperature sensor errors for the LCD, you may need this replaced. Apple part number: 922-9141, 593-1012