Lenovo ThinkSystem SR850 Maintenance Manual page 70

The power control button on the device and the power switch on the power supply do not turn off the
electrical current that is supplied to the device. The device also might have more than one power
cord. To remove all electrical current from the device, ensure that all power cords are disconnected
from the power source.
S017
CAUTION:
Hazardous moving fan blades nearby.
Before removing the fan cage assembly:
1. Read the safety information and installation guidelines (see "Safety" on page iii and "Installation
Guidelines" on page 51).
2. Turn off the server and peripheral devices and disconnect the power cords and all external cables (see
"Power off the server" on page 8).
3. 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.
4. Watch the procedure. A video of this procedure is available from the following links:
• https://www.youtube.com/playlist?list=PLYV5R7hVcs-B2y7oAb54mfyuLrIusa_qE
• http://list.youku.com/albumlist/show/id_50483449
5. Remove the top cover (see "Remove the top cover" on page 130).
To remove the fan cage assembly, complete the following steps:
Step 1. Lift and rotate the fan cage release latches to disengage the fan cage assembly from the server.
Figure 49. Fan cage assembly removal
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ThinkSystem SR850 Maintenance Manual