11. Install the heat sink and fan assembly and connect the heat-sink-and-fan-assembly cable to the newsystem board. See “Replacing the heat sink and fan assembly” on page 103.Note: If necessary, apply the appropriate amount of thermal grease on the bottom of the heat sinkand fan assembly.12. Install all memory modules and PCI Express cards removed from the failing system board on the newsystem board. See “Installing or replacing a memory module” on page 92 and “Installing or replacing aPCI Express card” on page 94.13. Refer to your record to connect cables to the new system board. You also can refer to “Locatingparts on the system board” on page 73 to help you locate the connectors on the system board andconnect cables.14. To complete the replacement, go to “Completing the parts replacement” on page 131.The failing system board must be returned with a microprocessor socket cover to protect the pins duringshipping and handling.To install the microprocessor socket cover, do the following:1. After you have removed the microprocessor from the failing system board, close the microprocessorretainer and then put the lever to the locked position to secure the retainer in place.2. Note the orientation of the socket cover, and install one side of the socket cover onto the microprocessorsocket. Carefully press the other side of the socket cover downward until the socket cover snapsinto position.Note: Your microprocessor socket and cover might look slightly different from the illustration.Figure39. Installing the socket cover onto the microprocessor socket3. Carefully check the four corners of the socket cover to ensure that the cover is seated securely.4. Follow any additional instructions included with the replacement part you received.Installing the solid-state driveAttention:Do not open your computer or attempt any repair before reading and understanding the “Important safety information”on page 1.This section provides instructions on how to install the 2.5-inch solid-state drive.To install the solid-state drive, do the following:110 ThinkCentre M73 Hardware Maintenance Manual
