IBM eServer 135 xSeries User Reference Manual page 63

6. Install the DIMM in the connector.
Attention: To prevent damage to the DIMM connectors, do not force the memory
module into the connector.
a. Turn the DIMM so that the index slots align correctly with the connector.
Note: The DIMM has two index slots, one in the center and the other on the
left half of the DIMM connector edge.
b. Insert the DIMM into the connector by pressing on both corners of the DIMM
at the same time. Be sure to press straight into the connector.
c. When installing a memory module, be sure that no gap exists between the
DIMM and the retaining clips. If a gap does exist between the memory
module and the retaining clips, remove the DIMM; then, reinsert the DIMM
properly.
If you have other options to install, install them now.
Note:
7. Replace the cover on the server; then, reinstall the server in the rack and connect
all external cables. For more information, see "Installing the cover" on page 56 for
instructions.
8. Turn on the server.
Note: When you restart the server, the system displays a message indicating
that the memory configuration has changed.
• If you just replaced a failed DIMM, you must start the
Configuration/Setup Utility program, select Advanced Setup,
select Memory Settings, highlight the connector or bank of
connectors that you want to enable, and then select Enable.
• In some memory configurations, the 3-3-3 beep code might sound
during POST, followed by a blank display screen. If this occurs and
the Boot Fail Count feature in the Start Options of the
Configuration/Setup Utility is set to Enabled (its default setting),
you must restart the server three times to force the system BIOS to
reset the memory connector or bank of connectors from Disabled to
Enabled.
Connector 1
Connector 2
Connector 3
Connector 4
Chapter 5. Installing options
51