Lenovo THINKSERVER 3821 - Manual (Page 235)

Removing a heat-sink retention module
1 Alignment triangle
To remove a heat-sink retention module, complete the following steps:
1. Read the safety information that begins on page 5.
2. Turn off the server and all attached devices; then, disconnect all power cords
and external cables.
3. Carefully turn the server on its side so that it is lying flat, with the cover facing
up.
Attention: Do not allow the server to fall over.
4. Unlock and remove the side cover (see “Removing the left-side cover” on page
157).
5. Remove the power supply or power supplies from the power-supply cage (see
“Removing a hot-swap power supply” on page 174).
6. Rotate the power-supply cage to its open position (see “Opening the
power-supply cage” on page 158).
7. Remove the air baffle (see “Removing the air baffle” on page 169).
8. Remove the heat sink (see “Removing a microprocessor and heat sink” on
page 218).
9. Using a Phillips screwdriver, remove the four screws that secure the heat-sink
retention module to the system board; then, lift the heat-sink retention module
from the system board.
10. If you are instructed to return the heat-sink retention module, follow all
packaging instructions, and use any packaging materials for shipping that are
supplied to you.
Chapter 7. Installing optional devices and replacing customer replaceable units 227