Lenovo ThinkSystem SR850P Maintenance Manual page 127

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4. Read the safety information and installation guidelines (see
Guidelines" on page
5. Turn off the server and peripheral devices and disconnect the power cords and all external cables (see
"Power off the server" on page
6. If the server is installed in a rack, slide the server out on its rack slide rails to gain access to the top
cover, or remove the server from the rack.
7. Watch the procedure
A video of this procedure is available at YouTube:
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8. Remove the top cover (see
To remove the system board, complete the following steps:
Step 1.
Remove the power supply unit(s) (see
Step 2.
Remove the processor and memory expansion tray and the expansion tray air baffles (see
"Remove the processor and memory expansion tray" on page
Step 3.
Remove the fan cage assembly (see
Step 4.
Disconnect all cables from the system board. Make a list of each cable as you disconnect it and
use it as a checklist after installing the new system board.
Step 5.
Remove all the memory modules from the system board, and set them aside on a static-protective
surface for reinstallation (see
Important: Record the slot number of each memory module before removing it, and make sure to
install it back to the exact same slot on the new system board later.
Step 6.
Remove the PCIe riser-card if it has been installed (see
page
87).
Step 7.
Remove the LOM adapter if it has been installed (see
Step 8.
Remove all the other adapters installed on the system board (see
91).
Step 9.
Disconnect the USB 3.0 cable of operator panel tray assembly and remove it vertically from the
system board.
Figure 119. Disconnecting USB 3.0 vertically
Step 10. Remove all the PHMs installed on the system board (see
page
105).
49).
11).
.
"Remove the top cover" on page
"Remove a hot-swap power supply unit" on page
"Remove the fan cage assembly" on page
"Remove a memory module" on page
"Safety" on page iii
https://www.youtube.com/playlist?list=
133).
110).
77).
"Remove the PCIe riser-card assembly" on
"Remove the LOM adapter" on page
"Remove an adapter" on page
"Install a processor and heat sink" on
.
Chapter 3
Hardware replacement procedures
and
"Installation
94).
59).
69).
119

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