Replacing The Heat Sink - Lenovo ThinkCentre M91 Hardware Maintenance Manual

7. Turn on the computer and all attached devices.
8. Use the Setup Utility program to set the date, time, and any passwords. See Chapter 6 "Using the Setup
Utility program" on page 41.

Replacing the heat sink

Attention:
Do not open your computer or attempt any repair before reading and understanding the "Important safety information"
in the ThinkCentre User Guide. To obtain a copy of the ThinkCentre User Guide, go to:
http://www.lenovo.com/ThinkCentreUserGuides
This section provides instructions on how to replace the heat sink.
CAUTION:
The heat sink might be very hot. Turn off the computer and wait three to five minutes to let the
computer cool before opening the computer cover.
To replace the heat sink, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Open the computer cover. See "Opening the computer cover" on page 72.
3. Locate the heat sink. See "Locating components" on page 71.
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Chapter 8 Replacing FRUs
81