Dimm Replacement Procedure - Cisco UCS C420 Installation And Service Manual

Installing or Replacing Server Components

DIMM Replacement Procedure

This section includes the following topics:
•
•
Identifying a Faulty DIMM
Each DIMM socket on the motherboard has a corresponding DIMM fault LED. See
LEDs, page 3-7
Replacing DIMMs
To install a DIMM assembly, follow these steps:
Step 1 Remove the DIMMs that you are replacing:
a.
b.
Caution If you cannot safely view and access the component, remove the server from the rack.
c.
d.
e.
Install a new DIMM:
Step 2
Note
a.
b.
c.
d.
Cisco UCS C420 Server Installation and Service Guide
3-26
Identifying a Faulty DIMM, page 3-26
Replacing DIMMs, page 3-26
for the locations of the LEDs and how to activate them.
Power off the server as described in
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.
Remove the top cover as described in
page 3-9.
Remove the internal air baffle that covers the DIMM sockets.
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.
Before installing risers or DIMMs, refer to the population guidelines. See
Guidelines and Population Rules, page
Align the new DIMM with the socket on the motherboard. Use the alignment key in the DIMM
socket to correctly orient the DIMM.
Push the DIMM into the connector until it is fully seated and the ejector levers on either side of the
connector lock into place.
Replace the internal air baffle, and then replace the top cover.
Replace the server in the rack, replace cables, and then power on the server by pressing the Power
button.
Shutting Down and Powering Off the Server, page
"Removing and Replacing the Server Top Cover" section on
3-21.
Chapter 3 Maintaining the Server
Internal Diagnostic
3-8.
DIMM Performance
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