IBM 436854u Service Guide - Page 130

6. Install the fan sink: a. Make sure that the fan-sink retention lever is in the fully open position. Important: Be careful when you handle the microprocessor and fan sink. Do not contaminate the thermal material between them. Fan sink Retention module Retention lever b. Slide the bottom edge of the fan sink under the lower flange of the retention module; then, place the top of the fan sink onto the top of the retention module. c. Close the fan-sink retention lever and lock it securely in place. d. Reconnect the fan-sink cable to the system board (see "System-board internal connectors" on page 9 for the location of the fan-sink connector). 7. Reconnect any cables that you disconnected during the removal of the old microprocessor. 8. Install the side cover (see "Installing the side cover" on page 53). 9. Lock the side cover if you unlocked it during removal. 10. Reconnect the external cables and power cords; then, turn on the attached devices and turn on the server. Thermal grease The thermal grease must be replaced whenever the fan sink has been removed from the top of the microprocessor and is going to be reused or when debris is found in the grease. When you are installing the fan sink on the same microprocessor that is was removed from, make sure that: v The thermal grease on the fan sink and microprocessor is not contaminated. v Additional thermal grease is not added to the existing thermal grease on the fan sink and microprocessor. 112 System x3200 M2 Types 4367 and 4368: Problem Determination and Service Guide