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Cisco UCS C240 M4 Server Installation and Service Guide
OL-32474-01
Chapter 3 Maintaining the Server
Installing or Replacing Server Components
Replacing a CPU and Heatsink
Caution CPUs and their motherboard sockets are fragile and must be handled with care to avoid damaging pins
during installation. The CPUs must be installed with heatsinks and their thermal grease to ensure proper
cooling. Failure to install a CPU correctly might result in damage to the server.
Note This server uses the new independent loading mechanism (ILM) CPU sockets, so no Pick-and-Place
tools are required for CPU handling or installation. Always grasp the plastic frame on the CPU when
handling.
Step 1 Power off the server as described in Shutting Down and Powering Off the Server, page 3-9.
Step 2 Slide the server out the front of the rack far enough so that you can remove the top cover. You might have
to detach cables from the rear panel to provide clearance.
Caution If you cannot safely view and access the component, remove the server from the rack.
Step 3 Remove the top cover as described in Removing and Replacing the Server Top Cover, page 3-10.
Step 4 Remove the plastic air baffle that sits over the CPUs.
Step 5 Remove the heatsink that you are replacing:
a. Use a Number 2 Phillips-head screwdriver to loosen the four captive screws that secure the heatsink.
Note Alternate loosening each screw evenly to avoid damaging the heatsink or CPU.
b. Lift the heatsink off of the CPU.
Step 6 Open the CPU retaining mechanism:
a. Unclip the first retaining latch labeled with the icon, and then unclip the second retaining
latch labeled with the icon. See Figure 3-16.
b. Open the hinged CPU cover plate.
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