Lenovo 3000 C305 All-In-One - Manual (Page 13)

Chapter 2. Safety information
11
CAUTION:
Use safe practices when lifting.
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.
1
2
CAUTION:
Do not place any object weighing more than 82 kg (180 lbs.) on top of
rack-mounted devices.