Dell Inspiron 510m - Manual (Page 42)

7. Lift up the microprocessor thermal-cooling assembly and remove it from the system board.
Installing the Microprocessor Thermal-Cooling Assembly
1. Slip the left side of the microprocessor thermal-cooling assembly underneath the palm rest and then place the assembly over the microprocessor.
2. Tighten the four captive screws, labeled "1" through "4," in consecutive order.
1 microprocessor thermal-cooling assembly
2 captive screws (4)
1 microprocessor thermal-cooling assembly
NOTE: When you tighten the captive screws, ensure that the screw heads are flush with the level of the cooler plate.