Lenovo 3823, 3821, 3822, 3719 manual

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 microprocessor heat sink:

a.Lift the heat-sink release lever to the fully open position.

b.Rotate the back of the heat sink out of the retention bracket and remove the heat sink from the server.

Attention: Do not touch the thermal grease on the bottom of the heat sink. Touching the thermal grease will contaminate it. If the thermal grease on the microprocessor or heat sink becomes contaminated, you must replace it. See “Thermal grease” on page 226 for more information.

Heat sink flange

Microprocessor

Release level locking tab

Retainer bracket

Alignment tab

Heat sink release level

Notch

9.Lift the microprocessor-release latch to the fully open position (approximately 135° angle); then, lift the bracket frame and remove the microprocessor from the socket.

Chapter 7. Installing optional devices and replacing customer replaceable units 219