IBM 436854u Service Guide - Page 127

Removing the microprocessor and fan sink To remove the microprocessor and fan sink, complete the following steps: 1. Read the safety information that begins on page vii and "Installation guidelines" on page 47. 2. Turn off the server and all attached devices; then, disconnect all power cords and external cables. 3. Turn the server on its side so that it is lying flat, with the cover facing up. 4. Unlock and remove the side cover (see "Removing the side cover" on page 52). 5. Disconnect any cables that impede access to the fan sink and microprocessor. Attention: The fan-sink retention lever is spring-loaded when the fan sink is in place. Releasing the lever too quickly or allowing it to spring upward can damage the fan sink and surrounding components. 6. Remove the fan sink from the microprocessor: a. Disconnect the fan-sink cable from the system board. b. Release the fan-sink retention lever by pressing down on the end, moving it to the side and slowly releasing it to the open (up) position. Important: Be careful when you handle the microprocessor and fan sink. If the microprocessor and fan sink will be reused, do not contaminate the thermal material between them. Orientation indicators Fan-sink retention lever c. Tip the top of the fan sink toward the front of the server while you slide it away from the lower flange of the retention module; then, remove it from the server. After removal, place the fan sink on its side on a clean, flat surface. Chapter 4. Removing and replacing server components 109