Cisco Systems UCS C420 manual Dimm Replacement Procedure

Chapter 3 Maintaining the Server

Installing or Replacing Server Components

DIMM Replacement Procedure

This section includes the following topics:

•Identifying a Faulty DIMM, page 3-26

•Replacing DIMMs, page 3-26

Identifying a Faulty DIMM

Each DIMM socket on the motherboard has a corresponding DIMM fault LED. See Internal Diagnostic LEDs, page 3-7for the locations of the LEDs and how to activate them.

Replacing DIMMs

To install a DIMM assembly, follow these steps:

Step 1 Remove the DIMMs that you are replacing:

a.Power off the server as described in Shutting Down and Powering Off the Server, page 3-8.

b.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.

c.Remove the top cover as described in “Removing and Replacing the Server Top Cover” section on page 3-9.

d.Remove the internal air baffle that covers the DIMM sockets.

e.Locate the faulty DIMM and remove it from the socket on the motherboard by opening the ejector levers at both ends of the DIMM socket.

Step 2 Install a new DIMM:

Note Before installing risers or DIMMs, refer to the population guidelines. See DIMM Performance Guidelines and Population Rules, page 3-21.

a.Align the new DIMM with the socket on the motherboard. Use the alignment key in the DIMM socket to correctly orient the DIMM.

b.Push the DIMM into the connector until it is fully seated and the ejector levers on either side of the connector lock into place.

c.Replace the internal air baffle, and then replace the top cover.

d.Replace the server in the rack, replace cables, and then power on the server by pressing the Power button.

	Cisco UCS C420 Server Installation and Service Guide
3-26	OL-27640-01