Lenovo ThinkCentre E51 Hardware Maintenance Manual - Page 151
Use the thermal grease syringe to place five drops of grease on the top of
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10. Position the microprocessor so that the notches 1 are aligned with the corresponding tabs in the socket. 11. Using the vacuum pen, lower the microprocessor straight down into the microprocessor socket. Note: Install the black protective cover that was removed from the new microprocessor onto the defective microprocessor after the installation is complete. 12. Lower the microprocessor retainer. 13. Lock the retainer with the small handle to secure the microprocessor in the socket. 14. Use the thermal grease syringe to place five drops of grease on the top of the microprocessor. Each drop of grease should be 0.03ml (3 tick marks on the grease syringe). 15. Install the heat sink and fan assembly on the system board. 16. Connect the heat sink and fan assembly cable to the system board. See the system board illustration for your machine type at "Identifying parts on the system board" on page 123. 17. Position the fan duct on the heat sink fan. 18. Go to "Completing the FRU replacement" on page 154. Chapter 9. Replacing FRUs (Desktop computers) 145