Lenovo ThinkSystem SR550 Maintenance Manual page 108

CAUTION:
The power-control button on the device does not turn off the electrical current supplied to the device.
The device also might have more than one connection to dc power. To remove all electrical current
from the device, ensure that all connections to dc power are disconnected at the dc power input
terminals.
To install a hot-swap power supply, complete the following steps:
Watch the procedure
A video of this procedure is available at
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Step 1. Touch the static-protective package that contains the new power supply to any unpainted surface
on the outside of the server. Then, take the power supply out of the package and place it on a
static-protective surface.
Step 2. If the server is in a rack, adjust the cable management arm (CMA) to gain access to the power
supply bay.
If you have installed the ThinkSystem 2U CMA Upgrade Kit for Toolless Slide Rail or ThinkSystem
Toolless Slide Rail Kit with 2U CMA, do the following:
Figure 74. CMA adjustment
a. Press down the stop bracket
b. Rotate the CMA out of the way to gain access to the power supply bay.
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https://www.youtube.com/playlist?list=PLYV5R7hVcs-
.
and rotate it to the open position.
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