Lenovo 4219, 4220, 4222, 4215, 4221 manual Replacing the heat sink and fan assembly, What to do next

10.Secure the power supply assembly cables with the cable clips and ties in the chassis.

What to do next:

vTo work with another piece of hardware, go to the appropriate section.

vTo complete the replacement, go to “Completing the parts replacement” on page 40.

Replacing the heat sink and fan assembly

Attention

Do not open your computer or attempt any repair before reading and understanding the “Important safety information” in the ThinkStation Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkStation Safety and Warranty Guide, go to: http://www.lenovo.com/support

This section provides instructions on how to replace the heat sink and fan assembly.

CAUTION:

The heat sink and fan assembly might be very hot. Turn off the computer and wait three to five minutes to let the computer cool before removing the computer cover.

To replace the heat sink and fan assembly, do the following:

1.Remove the computer cover. See “Removing the computer cover” on page 14.

2.Lay the computer on its side for easier access to the system board.

3.Locate the heat sink and fan assembly. See “Locating parts on the system board” on page 11.

4.Disconnect the heat sink and fan assembly cable from the microprocessor fan connector on the system board. See “Locating parts on the system board” on page 11.

Chapter 2. Installing or replacing hardware 25