Processor And Memory Expansion Tray Replacement - Lenovo ThinkSystem SR850 Maintenance Manual

Figure 105. Installing a PHM
a. Align the triangular marks and guide pins on the processor socket with the PHM; then, insert
the PHM into the processor socket.
Attention: To prevent damage to components, make sure that you follow the indicated
tightening sequence.
b. Fully tighten the Torx T30 captive fasteners in the installation sequence shown on the heat-sink
label. Tighten the screws until they stop; then, visually inspect to make sure that there is no
gap between the screw shoulder beneath the heat sink and the processor socket. (For
reference, the torque required for the nuts to fully tighten is 1.4 — 1.6 newton-meters, 12 — 14
inch-pounds).
After you install a PHM:
1. If there are DIMMs to install, install them. See "Install a memory module" on page 81.
2. Reinstall the system board air baffle (see "Install the system board air baffle and the power interposer"
on page 118) or processor and memory expansion tray and expansion tray air baffle (see "Install the
processor and memory expansion tray " on page 111).
3. Reinstall the top cover (see "Install the top cover" on page 131).
4. Reconnect the power cords and any cables that you removed.
5. Power on the server and any peripheral devices.

Processor and memory expansion tray replacement

Use this procedure to remove or install expansion tray air baffle and processor and memory expansion tray.
Note: If your server comes with two processors, skip this section and go to "System board air baffle and the
power interposer replacement" on page 116.
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Chapter 3 Hardware replacement procedures
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