IBM System x3800 Problem Determination And Service Manual page 164

10. Install the microprocessor tray in the server:
11. Install the bezel and front cover (tower model only) (see "Replacing the top
12. Connect the cables and power cords (see "Connecting the cables" on page
13. Turn on all attached devices and the server.
148
IBM System x3800 Type 8866: Problem Determination and Service Guide
4. Make sure that the heat-sink retaining clip is open.
5. If you are installing a new heat sink, remove the cover from the bottom of the
heat sink. If you are reinstalling a heat sink that was previously removed, see
"Thermal grease" on page 149 for instructions for replacing the contaminated
or missing thermal grease; then, return to this step.
6. If necessary, remove the cover from the bottom of the heat sink.
7. Position the heat sink above the microprocessor, making sure that the word
"Front" is closest to the front of the server; then, press the heat sink into place
and close the heat-sink release lever.
Heat sink
Note: If you are installing an additional microprocessor in microprocessor
socket 3 or 4, you must also install a VRM.
8. If necessary, install a VRM in the connector.
a. Open the retaining clips on each end of the VRM connector.
b. Turn the VRM so the keys align with the slot.
c. Insert the VRM into the connector by aligning the edges of the VRM with
the slots at the end of the VRM connector. Firmly press the VRM straight
down into the connector by applying pressure on both ends of the VRM
simultaneously. The retaining clips snap into the locked position when the
VRM is seated in the connector.
9. Install the air baffle in the microprocessor tray.
Note: Make sure that the air baffle lies flat and within the grooves on top of
the microprocessor heat sinks and microprocessor baffles and that the air
baffle remains in place while you close the microprocessor tray. You might find
it helpful to hold the air baffle in place with your thumbs while closing the
microprocessor tray.
a. Make sure that the microprocessor-tray release latch is open; then, push
the microprocessor tray into the server.
b. Close the tray levers and make sure they are securely latched.
c. Close the microprocessor-tray release latch.
d. Reinstall the fans and memory cards in the server.
cover, bezel, and front cover" on page 119).
116 for cabling instructions).
Heat sink
retention clip