Lenovo ThinkCentre A70 7099 Hardware Maintenance Manual page 161

4. Pivot the drive bay assembly upward to gain access to the front fan assembly.
See "Accessing the system board components and drives" on page 125.
5. Remove the hard disk drive for easier access to the front fan assembly. See
"Replacing the hard disk drive" on page 149.
6. Remove the heat sink fan duct. See "Replacing the heat sink and fan
assembly" on page 131.
7. Note the cable routing and disconnect the front fan assembly cable from the
system fan connector on the system board. See "Locating parts on the system
board" on page 120.
8. The front fan assembly is attached to the chassis by four rubber mounts 1 .
Remove the front fan assembly by cutting the rubber mounts and lifting the
front fan assembly out of the chassis.
Figure 74. Removing the front fan assembly
Chapter 9. Replacing FRUs - Desktop computers
155