Lenovo System x3750 M4 Installation And Service Manual page 249

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To install a DIMM, complete the following steps:

Read the safety information, see "Safety" on page v and "Installation guidelines" on page 38.

Turn off the server and peripheral devices and disconnect the power cords and all external cables,

if necessary.

Remove the top cover (see "Removing the server top cover" on page 216).

Touch the static-protective package that contains the DIMM to any unpainted metal surface on the

outside of the server; then, remove the DIMM from the package.

Open the retaining clip on each end of the DIMM connector.

Attention: To avoid breaking the retaining clips or damaging the DIMM connectors, open and

close the clips gently.

Turn the DIMM so that the DIMM keys align correctly with the connector.

Insert the DIMM into the connector by aligning the edges of the DIMM with the slots at the ends of

the DIMM connector (see "System-board optional-device connectors" on page 32 for the locations

of the DIMM connectors).

Firmly press the DIMM straight down into the connector by applying pressure on both ends of the

DIMM simultaneously. The retaining clips snap into the locked position when the DIMM is firmly

seated in the connector.

Note: If there is a gap between the DIMM and the retaining clips, the DIMM has not been correctly

inserted; open the retaining clips, remove the DIMM, and then reinsert it.

Replace the DIMM air baffle (see "Replacing the DIMM air baffle" on page 221) or the

microprocessor and memory expansion tray (see "Replacing the microprocessor and memory

expansion tray assembly" on page 125), if you removed it earlier.

Step 10. Reconnect the power cord and any cables that you removed.

Step 11. Replace the cover (see "Replacing the server top cover" on page 216).

Removing and replacing components

Troubleshooting