Dell PowerEdge 6850 Parts list manual

www.dell.com | support.dell.com

About Cautions

CAUTION: A CAUTION indicates a potential for property damage, personal injury, or death.

System Board Replacement Procedure

Update

This document provides updated information for replacing the system board.

NOTE: See the latest version of the system’s documentation on support.dell.com for instructions on how

to remove and replace the system board.

Removing and Installing the North Bridge Heat Sink

CAUTION: Any installation that requires removal of the system cover is intended solely to be

performed by trained service technicians. See your Product Information Guide for complete information

about safety precautions, working inside the computer and protecting against electrostatic discharge.

When transferring components from the defective system board to the replacement system board,

ensure that you also transfer the north bridge heat sink. The north bridge heat sink is located

directly behind processor connectors 2 and 4.

Removing the North Bridge Heat Sink From the Defective System Board

Compress the two retention-clip tabs together to remove them from the retention-clip

securing slots, and then lift up the retention clip. See Figure 1.

If the heat sink has not separated from the north bridge chip, carefully rotate the heat sink in

a clockwise, then counterclockwise, direction until it releases from the chip. Do not pry the

heat sink off of the chip.

Lift off the heat sink.

Installing the North Bridge Heat Sink on the Replacement System Board

Using a clean lint-free cloth, remove the existing thermal grease from the north bridge heat

sink.

Apply thermal grease evenly to the top of the north bridge chip.

March 2005

www.dell.com | support.dell.com

Install the north bridge heat sink:

Orient the heat sink so that its alignment key is toward the back of the system board. See

Figure 1.

Slowly lower the end of the heat sink closest to processor connectors 2 and 4 into the

heat-sink bracket.

After the heat sink contacts the bottom of the heat-sink bracket, align the keys on the

heat sink and the heat-sink bracket, then lower the heat sink until it lays flat in the

bracket. See Figure 1.

Lower the retention clip, compress the two retention-clip tabs together, and secure the

tabs into the retention-clip securing slots.

Figure 1. Removing and Installing the North Bridge Heat Sink

____________________

Information in this document is subject to change without notice.

Reproduction in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.

Trademarks used in this text: Dell and the DELL logo are trademarks of Dell Inc.

Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names

or their products. Dell Inc. disclaims any proprietary interest in trademarks and trade names other than its own.

north bridge heat sink

retention-clip

tabs (2)

retention-clip

securing slots (2)

heat-sink bracket

heat-sink alignment key

heat-sink bracket alignment key

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