IBM BladeCenter 8677 - Manual (Page 14)

Statement 20:
CAUTION:
To avoid personal injury, before lifting the unit, remove all the blades to
reduce the weight.
Statement 21:
CAUTION:
Hazardous energy is present when the blade is connected to the power
source. Always replace the blade cover before installing the blade.
xii BladeCenter Type 8677: Installation and User’s Guide