Dell Latitude E6520 (Early 2011) - Manual (Page 51)

Processor
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Removing The Processor
1. Follow the procedures in Before Working On Your Computer .
2. Remove the battery .
3. Remove the base cover .
4. Remove the heat-sink .
5. Rotate the processor cam lock in a counter-clockwise direction.
6. Lift up and remove the processor from the system board.
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