Lenovo ThinkCentre E51 Hardware Maintenance Manual - Page 105

15. Using the vacuum pen 1 to pick up the microprocessor, lower the microprocessor straight down into the socket. 16. Lower the microprocessor retainer. 17. Lock the retainer with the small handle to secure the microprocessor in the socket. 18. Install a new retention bracket for the heat sink by aligning the posts on the bracket with the holes in the system board and pushing the posts through the holes until the retention bracket is secure. 19. Install the heat sink and fan assembly on the system board. 20. Connect the heat sink and fan assembly cable to the new system board. See the system board illustration for your machine type at "Identifying parts on the system board" on page 86. 21. Install the new system board into the chassis and align the screw holes with those in the chassis. Insert and tighten the screws that secure the system board. 22. Connect all cables to the system board. See the system board illustration for your machine type at "Identifying parts on the system board" on page 86. 23. Go to "Completing the FRU replacement" on page 116. Machine types 8463, 8464, 8465, 8712, and 8713 1. Remove only the left-side cover. See "Removing the covers" on page 85. 2. Place the computer on its right side to help make the system board more accessible. 3. Remove any adapter cards installed in the PCI connectors. See "Replacing a PCI adapter" on page 92. 4. Carefully take note of the location of all cable connections on the system board and disconnect all cables. See the system board illustration for your machine type at "Identifying parts on the system board" on page 86. 5. Remove the screws that secure the system board to the chassis. 6. Lift the system board out of the chassis. 7. Remove the memory modules from the failing system board and install them in the same location on the new system board. Chapter 8. Replacing FRUs (Tower computers) 99