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Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo
recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches
or other damage.
To replace the system fan
Step 1.
Remove any media from the drives, shut down the operating system, and turn off the computer
and all attached devices.
Step 2.
Unplug all power cords from electrical outlets.
Step 3.
Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to Locating connectors,
controls and components to locate the various connectors.
Step 4.
Remove the stand base. Refer to Removing the stand base.
Step 5.
Remove the rear cover. Refer to Removing the rear cover.
Step 6.
Remove the hard disk drive. Refer to Replacing the hard disk drive.
Step 7.
Remove the stand holder. Refer to Removing the stand holder.
Step 8.
Remove the middle cover. Refer to Removing the middle cover.
Step 9.
Remove the EMI cover. Refer to Removing the EMI cover.
Step 10. Remove the mount bracket. Refer to Removing the mount bracket.
Step 11. Remove the three screws that secure the system fan to the chassis.
Step 12. Disconnect the system fan power cable from the motherboard.
Step 13. Lift the system fan up to remove it.
Step 14. To install the new system fan:
a.
Place the new system fan into position, and then secure it to the chassis with three screws.
b.
Connect the system fan power cable to the connector on the motherboard.
Step 15. Reinstall all the removed parts, and then reconnect all the disconnected cables.
46
ideacentre All-In-One 720 Computer Hardware Maintenance Manual
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