Lenovo ThinkSystem SR650 Maintenance Manual page 121

Hazardous energy present. Voltages with hazardous energy might cause heating when shorted with
metal, which might result in spattered metal, burns, or both.
S017
CAUTION:
Hazardous moving fan blades nearby.
Attention: When removing a system fan without powering off the server, do not touch the system fan cage.
Before removing a system fan:
1. Remove the top cover. See "Remove the top cover" on page 103.
2. View the fan error LEDs
Figure 82. Viewing the fan error LEDs from the top of the system fans
To remove a system fan, complete the following steps:
Watch the procedure. A video of the removal process is available:
• Youtube:
https://www.youtube.com/playlist?list=PLYV5R7hVcs-A25P7vBoGa_wn7D7XTgDS_
• Youku: http://list.youku.com/albumlist/show/id_50483444
1 to locate the failing system fan.
.
Chapter 3 Hardware replacement procedures
113