Lenovo Personal Computer 4263 User Manual download pdf (Page 40)

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. Remove the computer cover. See “Removing the computer cover” on page 13.

3. Remove the PCI card holder. See “Removing and reinstalling the PCI card

holder” on page 16.

4. Your computer supports two heat sink and fan assemblies. Locate the heat

sink and fan assembly you want to replace. See “Locating components” on

page 10.

5. Depending on the heat sink and fan assembly you want to replace, do one of

the following:

v If you are replacing heat sink and fan assembly 1, go to 6.

v If you are replacing heat sink and fan assembly 2, do the following:

a. Remove the optical drive. See “Replacing the optical drive” on page 29.

b. Pivot the optical drive bracket as shown in the following illustration and

then remove it from the chassis. Go to 6.

6. Disconnect the heat sink and fan assembly cable from the system board. Note

the cable location.

Figure 27. Removing the optical drive bracket

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Lenovo Personal Computer 4263 User Manual Page 40