Dell OptiPlex 390 Owners Manual - Page 28

the retention hook that secures it., Lift the processor cover.

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8. Lift the heat sink assembly upwards, and remove it from the computer. Lay the assembly with the fan facing downwards, and with the thermal grease facing upwards. 9. Press the release lever down and then move it outward to release it from the retention hook that secures it. 10. Lift the processor cover. 28

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8.
Lift the heat sink assembly upwards, and remove it from the computer. Lay
the assembly with the fan facing downwards, and with the thermal grease
facing upwards.
9.
Press the release lever down and then move it outward to release it from
the retention hook that secures it.
10.
Lift the processor cover.
28