Lenovo x3650 M4 BD 5466 Installation And Service Manual page 243

Step 1. Read the safety information that begins on page "Safety" on page v and "Installation guidelines"
on page 30.
Step 2. Turn off the server (see "Turning off the server" on page 19) and all attached peripheral devices.
Disconnect all power cords; then, disconnect all external cables as necessary to replace the device.
Step 3. Remove the server top cover (see "Removing the server top cover" on page 247).
Step 4. Rotate the hot-swap rear hard disk drive cage up (see "Rotating the hot-swap rear hard disk
drive cage up" on page 155.
Step 5. Remove the PCI riser-card assembly (see "Removing a PCI riser-card assembly" on page 197).
Step 6. Remove the air baffle (see "Removing the air baffle" on page 249).
Step 7. Disconnect any cables that impede access to the heat sink and microprocessor.
Step 8. If you are removing microprocessor 1, remove the memory modules from DIMM connectors 4 and
5. If you are removing microprocessor 2, remove the memory modules from DIMM connectors 12
and 13. See "Removing a memory module" on page 177 for instructions.
Step 9. Remove the heat sink:
Attention: Do not touch the thermal material on the bottom of the heat sink. Touching the thermal
material will contaminate it. If the thermal material on the microprocessor or heat sink becomes
contaminated, you must wipe off the contaminated thermal material on the microprocessor or heat
sink with the alcohol wipes and reapply clean thermal grease to the heat sink.
a. Loosen the four screws on the corners of the microprocessor retainer.
Note: Please use Phillips screw driver No.0 to loosen screws.
b. Lift the heat sink out of the server. If the heat sink sticks to the microprocessor, slightly twist
the heat sink back and forth to break the seal. After removal, place the heat sink (with the
thermal grease side up) on a clean, flat surface.
Figure 166. Heat sink removal
Step 10. Open the microprocessor socket release levers and retainer:
.
Chapter 6 Removing and replacing components
229