Table of Contents
Advertisement
Processor and heat sink replacement
Use the following procedures to replace an assembled processor and heat sink, known as a processor-heat-
sink module (PHM), a processor, or a heat sink.
Attention: Before reusing a processor or heat sink, make sure you use Lenovo proven alcohol cleaning pad
and thermal grease.
Important: The processor in your server can throttle in response to thermal conditions, temporarily lowering
its speed to reduce heat output. In instances where a few processor cores are throttled for an extremely
short time period (100 ms or less), the only indication will be an entry in the operating system event log with
no corresponding entry in the system XCC event log. If this situation occurs, the event can be ignored and
processor replacement is not required.
Remove a processor and heat sink
Processors are on the system board and are to be accessed from the top of the server with top cover
removed. This task has instructions for removing an assembled processor and heat sink, known as a
processor-heat-sink module (PHM), a processor, and a heat sink. All of these tasks require a Torx T30 driver.
"Read the
installation
Guidelines" on
page 55
Attention:
• Each processor socket must always contain a cover or a PHM. When removing or installing a PHM,
protect empty processor sockets with a cover.
• Do not touch the processor socket or processor contacts. Processor-socket contacts are very fragile and
easily damaged. Contaminants on the processor contacts, such as oil from your skin, can cause
connection failures.
• Remove and install only one PHM at a time. If the system board supports multiple processors, install the
PHMs starting with the first processor socket.
• Do not allow the thermal grease on the processor or heat sink to come in contact with anything. Contact
with any surface can compromise the thermal grease, rendering it ineffective. Thermal grease can damage
components, such as electrical connectors in the processor socket. Do not remove the grease cover from
a heat sink until you are instructed to do so.
• Thermal grease can stay functional on the heat sink for two years. When installing a new heat sink, make
sure to check the manufacturing date to ensure the thermal grease is still functioning. If the date is over
two years ago, replace the thermal grease to avoid seating issues.
Before you remove a PHM:
Note: The heat sink, processor, and processor retainer for your system might be different than those shown
in the illustrations.
1. Read the safety information and installation guidelines (see
Guidelines" on page
2. Turn off the server and peripheral devices and disconnect the power cords and all external cables (see
"Power off the server" on page
3. Remove the top cover (see
ThinkSystem SR850 Maintenance Manual
110
the server for
this task" on
55).
11).
"Remove the top cover" on page
"Power off
page 11
"Safety" on page iii
145).
"ATTENTION: Static Sensitive
Device Ground package before
opening" on page 57
and
"Installation
Advertisement
Table of Contents
