Lenovo ThinkSystem ST250 V2 Maintenance Manual page 143

The power-control button on the device and the power switch on the power supply do not turn off
the electrical current 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.
• S009
CAUTION:
To avoid personal injury, disconnect the fan cables before removing the fan from the device.
• S014
CAUTION:
Hazardous voltage, current, and energy levels might be present. Only a qualified service technician
is authorized to remove the covers where the label is attached.
• S017
CAUTION:
Hazardous moving fan blades nearby. Keep fingers and other body parts away.
• S033
CAUTION:
Hazardous energy present. Voltages with hazardous energy might cause heating when shorted
with metal, which might result in spattered metal, burns, or both.
Attention:
• Read the "Installation guidelines" on page 85 to ensure that you work safely.
• Touch the static-protective package that contains the component to any unpainted metal surface on the
server; then, remove it from the package and place it on a static-protective surface.
Watch the procedure
A video of this procedure is available at YouTube:
DoEcxrm2zKNpaKOdZ3f8Qc
Procedure
https://youtube.com/playlist?list=PLYV5R7hVcs-
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Chapter 4 Hardware replacement procedures
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