Lenovo ThinkSystem SR550 Maintenance Manual page 104

To remove 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. If the server is in a rack, adjust the cable management arm (CMA) to gain access to the power
supply.
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 71. CMA adjustment
a. Press down the stop bracket
b. Rotate the CMA out of the way to gain access to the power supply.
Step 2. Disconnect the power cord from the hot-swap power supply.
Note: If you are replacing two power supplies, do the power supply replacement one by one to
ensure that the power supply to the server is not interrupted. Do not disconnect the power cord
from the secondly replaced power supply until the power output LED for the firstly replaced power
supply is lit. For the location of the power output LED, refer to "Rear view LEDs" on page 24.
ThinkSystem SR550 Maintenance Manual
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https://www.youtube.com/playlist?list=PLYV5R7hVcs-
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and rotate it to the open position.
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