Lenovo ThinkEdge SE455 V3 User Manual page 191

Figure 162. 2U heat sink removal
After this task is completed
1. If you are replacing a heat sink, install a new heat sink. See
2. If you are replacing a processor, remove the processor. See
3. If you are instructed to return the component or optional device, follow all packaging instructions, and
use any packaging materials for shipping that are supplied to you.
Remove a processor
Follow instructions in this section to remove a processor. This task requires a Torx T20 driver. The procedure
must be executed by a trained technician.
S002
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.
About this task
Attention:
• Read "Installation Guidelines" on page 39
work safely.
• If applicable, remove the security bezel. See
• Power off the server and peripheral devices and disconnect the power cords and all external cables. See
"Power off the server" on page
and "Safety inspection checklist" on page 40
"Remove the security bezel" on page
48.
"Install a heat sink" on page
"Remove a processor" on page
195.
.
Chapter 5 Hardware replacement procedures
186.
183.
to ensure that you
183