Dell ChengMing 3991 Service Manual page 34

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Steps
1. To remove the heat sink assembly:
2. Disconnect the cable from the connector on the system board.
3. Loosen the captive screws in a sequential order [4,3,2,1].
NOTE:
Remove the screws that secure the heat sink to the system board in the order of the callouts shown .
4. Lift the heat sink assembly away from the computer .
34
Disassembly and reassembly

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