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CPU removal and installation - ThinkPad Edge E420

For access, remove these FRUs in order:

Attention: CPU is extremely sensitive. When you service the CPU, avoid any kind of rough handling.

Rotate the head of the screw in the direction shown by arrow [1] to release the lock, then remove the CPU [2].

Please perform the following step as shown in the picture below.

CPU removal and installation

When installing: Place the CPU above the CPU socket, and then rotate the head of the screw in the direction shown by arrow [3] to secure CPU.


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  • Alias ID:
  • Document ID: PD015301
  • Last Updated :10/2/2014
  • (c) 2014 Lenovo