Laptop Motherboard Tested - Guaranteed Working Part Number: 71-D90T0-D05 This is a replacement motherboard for an Clevo D900T (D9T D90T) laptop computer. This part was originally manufactured for an Alienware system, it will display an Alienware logo when it boots. This part has been tested, it is guaranteed to work. If the unit fails within 90 days from bein received, you can send it back for repair or replacement. Installation of this part is available at our Ohio repair facility.