Lenovo IdeaCentre D400 Series Hardware Maintenance Manual page 17

Chapter 2. Safety information
  
18 kg(37 lbs) 32 kg(70.5 lbs) 55 kg(121.2 lbs)
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.
CAUTION:
Do not place any object weighing more than 82 kg (180 lbs.) on top of
rack-mounted devices.
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