Dell Studio XPS 1645 (Late 2009) - Manual (Page 24)

processor unit and the graphic processor unit.
5. Replace the processor heat sink (see Replacing the Processor Heat Sink ).
6. Replace the rear caps (see Replacing the Rear Caps ).
7. Replace the base cover (see Replacing the Base Cover ).
8. Slide the battery into the battery bay until it clicks into place.
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NOTE: If the processor, thermal fan, or system board is replaced, use the thermal cooling pads provided in the kit on the processor heat sink to ensure
that thermal conductivity is achieved. Do not reuse the old thermal cooling pads.