Lenovo ThinkSystem ST550 7X09 Maintenance Manual page 153

"Read the "ATTENTION:
installation Static Sensitive Device
Guidelines" on Ground package before opening"
page 59 on page 60
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. There are no serviceable parts inside these components. If you suspect a problem with one
of these parts, contact a service technician.
S002
CAUTION:
Make sure all power cords are disconnected from system when reading in this manual and the
following step is required to complete: Disconnect the power cords and all external cables from the
rear of the enclosure.
S001
. 145
Chapter 3 Hardware replacement procedures