2. Remove the cover from the server (see “Removing the cover and bezel” on
page 31).
3. Make sure the Memory Hot-Swap Enabled LED is lit on the top of the memory
card to be replaced. If the LED is not lit, enable memory mirroring (see “Active
Memory” on page 40).
4. Prepare the new memory card to go into the server:
a. Touch the static protective package containing the memory card to any
unpainted surface on the outside of the server. Then, remove the memory
card from the package.
b. Place the memory card on a flat, static protected surface with the DIMM
connectors facing up.
c. Install memory DIMMs in the memory card (see “Installing memory
modules”).
5.
Remove the memory card from the server:
a. Make sure that the retention levers on the edge of the memory card are fully
open.
b. Lift the memory card out of the server.
6.
Replace the memory card:
a. Grasp the new memory card by the retention levers and turn the memory
card so that the connector aligns with the connector on the microprocessor
board.
b. Insert the memory card into the memory card connector.
c. Press the memory card into the connector and close the retention levers.
Installing memory modules
Memory modules are installed on a memory card. DIMMs must be installed in pairs
of the same type and speed. To use the memory mirroring feature, all the DIMMs
that are installed in the server must be the same type and speed, and the feature
must be supported by your operating system. The following instructions are for
installing one pair of memory modules. To install memory-module pairs on more
than one memory card, repeat steps 3 though 7 for each memory card.
Installing a memory module: To install a memory module, complete the following
steps:
1. Read the safety information that begins on page vii, and “Handling
static-sensitive devices” on page 31.
2. Turn off the server and peripheral devices, and disconnect the power cords
and all external cables necessary to replace the device.
42 IBM System x3850 Type 8864: Problem Determination and Service Guide
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