Lenovo 3823, 3821, 3822, 3719 manual Install a heat sink on the microprocessor

Microprocessor release latch

Microprocessor bracket frame

Microprocessor

6.Install a heat sink on the microprocessor.

Attention: Do not touch the thermal grease on the bottom of the heat sink or set down the heat sink after you remove the plastic cover. Touching the thermal grease will contaminate it. If the thermal grease is contaminated, call Lenovo service to request a replacement thermal grease kit. For information about installing the replacement thermal grease, see “Thermal grease” on page 226.

Thermal grease

Heat sink

a.Make sure that the heat-sink release lever is in the fully open position.

b.Remove the plastic protective cover from the bottom of the heat sink, if one is installed.

c.Position the heat sink above the microprocessor with the thermal-grease side down.

Chapter 7. Installing optional devices and replacing customer replaceable units 223