Lenovo ThinkSystem ST250 V2 Maintenance Manual page 181

DANGER
Electrical current from power, telephone, and communication cables is hazardous.
To avoid a shock hazard:
– Connect all power cords to a properly wired and grounded electrical outlet/source.
– Connect any equipment that will be attached to this product to properly wired outlets/sources.
– When possible, use one hand only to connect or disconnect signal cables.
– Never turn on any equipment when there is evidence of fire, water, or structural damage.
– The device 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.
Figure 97. Fixed power supply label on the cover
The following tips describe the information that you must consider when you remove a power supply with
dc input.
NEVER CONNECT AND DISCONNECT THE POWER SUPPLY CABLE AND EQUIPMENT WHILE YOUR
EQUIPMENT IS POWERED ON WITH DC SUPPLY (hot-plugging). Otherwise you may damage the
equipment and result in data loss, the damages and losses result from incorrect operation of the
equipment will not be covered by the manufacturers' warranty.
• S002
CAUTION:
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.
• S035
CAUTION:
Never remove the cover on a power supply or any part that has this label attached. Hazardous
voltage, current, and energy levels are present inside any component that has this label attached.
.
Chapter 4 Hardware replacement procedures
171