Dell Inspiron 1428 Service Manual page 40

1 processor fan cable connector
3 processor fan
6 Lift the processor fan, along with the cable, off the computer.
7 In sequential order (indicated on the processor heat sink), remove the four
spring screws that secure the processor heat sink to the system board.
40
Processor Fan and Heat Sink Assembly
1
2 screws (3)
2
3