Lenovo ThinkCentre A70 7099 Hardware Maintenance Manual page 140

10. Connect the new heat sink and fan assembly cable to the microprocessor fan
11. Position the heat sink fan duct on the top of the new heat sink and fan
Figure 53. Installing the heat sink fan duct
12. To complete the replacement, go to "Completing the parts replacement" on
134
Hardware Maintenance Manual
b. Tighten screw 2 a small amount, then fully install screw 4 , and then
fully install screw 2 , as shown in Figure 52 on page 133.
connector on the system board. See "Locating parts on the system board" on
page 120.
assembly so that the four screw holes in the heat sink fan duct are aligned
with the corresponding holes in the new heat sink and fan assembly. Install
the four screws to secure the heat sink fan duct in place.
page 157.