Lenovo ThinkServer RD550 - Manual (Page 86)

9. Position the new memory module over the memory slot. Ensure that the notch 1 on the new memory
module is aligned with the key 2 in the memory slot. Then, press the new memory module straight down
into the memory slot until the retaining clips close and the new memory module snaps into position.
Note: If there is a gap between the memory module and the retaining clips, the memory module has
not been installed correctly. Open the retaining clips, remove the memory module, and then reinstall it
into the memory slot until the retaining clips are completely closed.
Figure 38. Installing a memory module
10. Reinstall any parts or reconnect any cables that you have removed.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation, go to “Completing the parts replacement” on page 144.
Removing a memory module
Attention: Do not open your server or attempt any repair before reading and understanding “Safety information”
on page iii and “Guidelines” on page 61.
Before you begin, print all the related instructions or ensure that you can view the PDF version on another
computer for reference.
Note: To optimize system performance, ensure that you consider and follow the memory module installation
rules when performing the operation. See “Memory module installation rules” on page 68.
To remove a memory module, do the following:
1. Remove all media from the drives and turn off all attached devices and the server. Then, disconnect all
power cords from electrical outlets and disconnect all cables that are connected to the server.
2. Prepare your server. See “Removing or extending the server from the rack cabinet” on page 63.
3. Remove the server cover. See “Removing the server cover” on page 63.
4. Remove the cooling shroud. See “Removing and reinstalling the cooling shroud” on page 66.
5. Locate the memory slots on the system board and read the memory module installation rules. See
“Memory module installation rules” on page 68.
6. Remove any parts or disconnect any cables that might prevent your access to the memory slots.
72 ThinkServer RD550 User Guide and Hardware Maintenance Manual