A000073390 Toshiba Satellite L640 Intel Laptop Motherboard s989 System Pull. Guaranteed for 90 days. Genuine part. Toshiba Toshiba Satellite L640 Intel Laptop Motherboard s989 Parts can usually not be interchanged - please check to make sure that your original part has this part number or that the manufacturer recommends this replacement part for your system. A000073390 Toshiba Satellite L640 Intel Laptop Motherboard S989