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System Memory

Dell™ OptiPlex™ GX400 Service Manual

  Removing a Memory Module

  Replacing a Memory Module

Removing a Memory Module

CAUTION: Before you perform this procedure, see "Precautionary Measures."

CAUTION: RIMMs can get very hot during system operation. Be sure that the RIMMs have had sufficient time to cool before you touch them.

NOTICE: Before disconnecting a device from the computer or removing a component from the system board, verify that the standby power light on the system board has turned off. To locate this light, see "System Board Components."

1. Turn off the computer and devices, disconnect them from their electrical outlets, wait at least 5 seconds, and then remove the computer cover.
   
   
2. Lay the computer on its right side.
   
   
3. Rotate the power supply away from the system board.
   
   
4. Remove the memory modules (RIMMs or CRIMMs):
   
   
   1. Press the securing clips at each end of the socket outward simultaneously until the module pops out slightly from the socket.
      
      
   2. Lift the module away from the socket.
      
      

NOTE: If you remove a module (RIMM or CRIMM), you must install another module in the empty socket before turning on the computer.

Removing a Memory Module

Replacing a Memory Module

1. Install the memory module:
   
   
   1. Press the securing clips at each end of the socket outward until they snap open.
      
      
   2. Align the slots on the bottom of the memory module with the two ridges inside the socket.
      
      
   3. Press the memory module straight down into the socket until the securing clips snap into place at the ends of the module.
      
      

Installing a Memory Module

2. Rotate the power supply back into position until the securing tab snaps into the release latch.
   
   
3. Stand the computer upright.
   
   
4. Replace the computer cover and restart the computer.
   
   

The computer detects that the new memory does not match the existing configuration information and generates the following message:

The amount of system memory has changed.
Strike the F1 key to continue, F2 to run the setup utility

5. Enter system setup, and check the value for System Memory. The computer should have already changed the value of System Memory to reflect the newly installed memory. If the new total is correct, skip to step 7.
   
   
6. If the memory total is incorrect, repeat step 1 and step 3 of "Removing a Memory Module." Check the installed modules to ensure that they are seated properly in their sockets. Then repeat step 2 through step 5 of this procedure.
   
   
7. When the System Memory total is correct, exit system setup.
   
   
8. Run the Dell Diagnostics to verify that the memory modules are operating properly.
   
   

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