This video will demonstrate the how to remove and install system memory on the PowerEdge R420. Replace defective DIMM and/or expand system memory to increase memory capacity. Before you begin: Power system down, unplug power cable, remove cover, remove cooling shroud. Use static discharge mat and bracelet.
WARNING: The memory modules are hot to the touch for some time after the system has been powered down. Allow time for the memory modules to cool before handling them. Handle the memory modules by the card edges and avoid touching the components or metallic contacts on the memory module.
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.
CAUTION: To ensure proper system cooling, memory-module blanks must be installed in any memory socket that is not occupied. Remove memory-module blanks only if you intend to install memory modules in those sockets.
Removing Memory Modules:
Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet and peripherals.
Open the system.
Remove the cooling shroud.
Locate the appropriate memory-module socket(s).
To release the memory-module blank from the socket, simultaneously press the ejectors on both ends of the memory module socket.
CAUTION: Handle each memory module only on the card edges, making sure not to touch the middle of the memory module or metallic contacts. To avoid damaging the memory module, handle only one memory module at a time.
a. memory module
b. memory-module socket ejectors (2)
c. memory-module socket
If a memory module or a memory-module blank is installed in the socket, remove it.
NOTE: Retain removed memory-module blank(s) for future use.
Install the cooling shroud.
Close the system.
Reconnect the system to its electrical outlet and turn the system on, including any attached peripherals.
Installing Memory Modules:
Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet.
Open the system.
If applicable, remove the cooling shroud.
Locate the memory-module sockets.
CAUTION: Handle each memory module only by the card edges, making sure not to touch the middle of the memory module or metallic contacts. To avoid damaging the memory module, handle only one memory module at a time.
If a memory module or a memory-module blank is installed in the socket, remove it.
NOTE: Retain removed memory-module blank(s) for future use.
Align the memory-module's edge connector with the alignment key of the memory-module socket, and insert the memory module in the socket.
NOTE: The memory-module socket has an alignment key that allows you to install the memory module in the socket in only one orientation.
CAUTION: To prevent damage to the memory-module socket during installation, apply pressure at both ends of the memory module evenly. Do not apply pressure to the center of the memory module.
Press down on the memory module with your thumbs until the memory module snaps into place.
Figure 1. Installing The Memory Module
a. memory module
b. memory-module ejectors
c. memory-module socket alignment key
d. memory-module alignment key
NOTE: When the memory module is properly seated in the socket, the levers on the memory-module socket align with the levers on the other identical sockets that have memory modules installed.
Repeat step 4 through step 7 of this procedure to install the remaining memory modules.
Replace the cooling shroud.
Close the system.
Reconnect the system to its electrical outlet and turn on the system, including any attached peripherals.
Press <F2> to enter the System Setup, and check the memory settings. The system should have already changed the value to reflect the newly installed memory.
If the value is incorrect, one or more of the memory modules may not be installed properly. Repeat step 4 through step 7 of this procedure, checking to ensure that the memory modules are firmly seated in their sockets.
Run the appropriate diagnostic test. For more information, see Using System Diagnostics.
