Dell Vostro 3750 (Early 2011) - Manual (Page 104)

16. Lift the heatsink and remove it from the system board.
Installing The PCH Heatsink
1. Tighten the screws that secure the PCH heatsink.
2. Install the
heatsink .
3. Install the system board .
4. Install the LED board .
5. Install the ExpressCard cable .
6. Install the system fan .
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