IBM eserver xSeries 330 - Manual (Page 12)

x IBM® xSeries 330: Installation Guide
Statement 8
CAUTION:
Never remove the cover on a power supply or any part that has the following label
attached.
Hazardous voltage, current, and energy levels are present inside any component
that has this label attached. There are no serviceable parts inside these
components. If you suspect a problem with one of these parts, contact a service
technician.
Handling static devices
This is a test of the emergency