Dell Precision 420 - Manual (Page 13)

To upgrade memory, perform the following steps.
NOTICE: See "Protecting Against Electrostatic Discharge" in your System Information Guide .
1. Remove the computer cover according to the instructions in " Removing the Computer Cover (Desktop Chassis) " or " Removing the
Computer Cover (Mini Tower Chassis) ."
2. Determine the RIMM sockets in which you will install RIMMs or replace existing RIMMs.
3. Install or remove RIMMs as necessary to reach the desired memory total.
4. Install C-RIMMs in any RIMM slots that do not contain RIMMs.
5. Replace the computer cover, and reconnect your computer and peripherals to their electrical outlets and turn them on.
The system detects that the new memory does not match the existing system 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
6. Press <F2> to enter the System Setup program, and check the value for System Memory in the lower-right corner of Page 1.
The system should have already changed the value of System Memory to reflect the newly installed memory. Verify the new total.
7. While in the System Setup program, reset the chassis intrusion detector by changing Chassis Intrusion to Enabled or Enabled-Silent.
8. When the system memory total is correct, press the <Esc> key to exit the System Setup program.
9. Run the Dell Diagnostics to verify that the RIMMs are operating properly.
See your Diagnostics and Troubleshooting Guide for information on running the diagnostics and troubleshooting any problems that may
occur.
Installing a RIMM
If a RIMM is already installed in the socket you want to use, you must remove it .
NOTICE: To avoid damage to the memory module, press the module straight down into the socket with equal force applied at each
end of the module.
To install a RIMM, perform the following steps (see Figure 7):
1. Locate the plastic securing clips at each end of the socket. Press the clips outward until they snap open.
2. Press the RIMM straight into the slot running down the center of the socket until the securing tabs snap into place around the ends of the
RIMM.
Figure 7. Installing a RIMM
512 MB 256 MB 256 MB C-RIMM C-RIMM
256 MB 64 MB 64 MB 64 MB 64 MB
256 MB 128 MB 128 MB C-RIMM C-RIMM
128 MB 64 MB 64 MB C-RIMM C-RIMM
CAUTION: Before you remove the computer cover, see " Safety First —For You and Your Computer ."
NOTE: After you remove and replace the cover, the chassis intrusion detector causes the following message to be displayed at
the next system start-up:
ALERT! Cover was previously removed.
NOTE: If the memory total is incorrect, turn off and disconnect your computer and peripherals from their electrical outlets. Remove
the computer cover, rotate the power supply, and check the installed RIMMs to make sure that they are seated properly in their
sockets. Then repeat steps 5, 6, and 7.
NOTE: If a setup password has been assigned by someone else, contact your network administrator for information on resetting
the chassis intrusion detector.