Replacing S3400-H memory modules

One or two Dual Inline Memory Module (DIMM) cards make up the memory module on the S3400-H motherboard. The number of memory modules present varies, depending on the type of motherboard that is installed:

• Nonintegrated video and LAN model: One 512K DIMM card is present in socket DIMM0.
• Integrated video and LAN model: Two 256K DIMM cards are present in sockets DIMM1A and DIMM2A.

The DIMM cards that make up the memory module can be replaced on site. The system must be powered down to reseat or replace a memory module.

Locating and reseating the memory module

Before you replace a memory module, verify that the DIMM card is firmly seated:

1. Verify that the replacement equipment is on site and appears to be in usable condition, with no obvious shipping damage.
2. Prepare to access the memory module:
   1. Shut down the system and unplug the AC power cords.
   2. Unplug the AC power cords.
3. For a rack-mount setup, remove the server from the cabinet:

   Caution: For safety purposes, get another person to assist you with moving the server.

   1. Prepare a clear area as a work surface for the server.
   2. Unplug all cables at the back of the server. Label all cables so you can easily reconnect them.
   3. Press the release clips on the rails to fully extend the rail.
   4. Lift the server off the rails and set the server on the work surface.
4. Remove the front bezel and top cover.
5. Remove the circuit card hold-down bracket.
6. Locate the memory module (DIMM card) on the motherboard. See S3400-H internal view. One or two DIMM cards might be present:
• Nonintegrated video and LAN model: One 512K DIMM card is present in socket DIMM0.
• Integrated video and LAN model: Two 256K DIMM cards are present in sockets DIMM1A and DIMM2A.
7. Verify that the memory module is properly seated:
   1. Apply pressure to the memory module to verify that the DIMM card is properly seated.
   2. Press the holding clips toward the memory module to verify that the clips are secure.

      Caution! Do not force the memory module into or out of the socket. This can damage the socket, the memory module, or both.

8. Continue as appropriate :
1. If the memory module was properly seated, replace it. Continue with Replacing a memory module.
2. If the memory module was not properly installed or seated, continue with this procedure to test it.
9. Restore power to the system. Leave the cover off but plug in the cables for the monitor, keyboard and mouse.
10. Watch the memory test at the beginning of the boot:
1. If the memory test completes, note the amount of memory reported.
2. Let the server boot completely.
11. Shut down the system and unplug the AC power cords.
12. Continue as follows:
1. If the system shows an amount of memory less than 512 MB or it did not boot, the memory module is not operating correctly. See Replacing a memory module.
2. If the system shows 512 MB of memory, the memory module is operating correctly. Continue with this procedure.
13. Replace the circuit card hold-down bracket.
14. Replace the top cover and front bezel.
15. Restore power to the system.
16. Place a test call to the system to verify operation after the system finishes booting. If the system is operating properly, you do not need to replace the memory module.

Replacing a memory module

To replace a memory module in an S3400-H server:

1. Press the holding clips on both sides of the socket outward to release the currently installed memory module. See the figure Removing the memory module.
2. Gently pull the memory module out of the socket.

Caution! The memory module can be damaged by electrostatic discharge. See Protecting against ESD damage for more information.

3. Hold the DIMM card by the edges, and remove the card from its antistatic package.
4. Position the replacement module in the correct orientation over the appropriate socket:
   • Nonintegrated video and LAN model: Use socket DIMM0.
   • Integrated video and LAN model: Use sockets DIMM1A and DIMM2A.

Note: If your model of server uses two DIMM cards for the memory module, you might need to replace both cards.

5. Gently push the replacement memory module into the appropriate socket. See the figure Installing the memory module.
6. When the DIMM card is seated firmly, the holding clips spring shut to lock it into position. Verify that the clips are firmly in place.

Caution! Do not force the memory module into or out of the socket. This can damage the socket, the memory module, or both.

7. Replace the circuit card hold-down bracket.
8. Replace the top cover and front bezel.
9. For a rack-mount setup, return the server to the cabinet:

   Caution: For safety purposes, get another person to assist you with moving the server.

   1. Push in the release lock, the front latch, to slide the server into the cabinet.
   2. Plug in all of the cables at the back of the server.
10. Restore power to the system.
11. Watch the memory test at the beginning of the boot:
1. If the memory test completes, note the amount of memory that the system reports.
2. Let the server boot completely.
12. Continue as follows:
    • If the system shows an amount of memory less than 512 MB or if the server did not boot, the memory module is faulty. Return to Locating and reseating the memory module to verify that the memory module is installed correctly. If so, you must replace the module.
    • If the system shows 512 MB of memory and booted correctly, the memory module is operating correctly. Continue with this procedure.
13. Verify that the server is operating correctly. For example, place a test call to the system.

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