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Step 5. Remove the 3 screws that secure the system fan to the motherboard.
Step 6. Disconnect the system fan power cables from the motherboard.
Step 7. Remove the system fan by lifting it up.
Step 8. To install the new system fan:
a. Line up the new system fan with the mounting holes on the chassis and place it into position.
b. Secure the new system fan with the 3 screws.
c. Connect the new system fan power cable to the connector on the motherboard.
Step 9. Reattach the computer cover.
Replacing the motherboard
Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.
Note: It may be helpful to place the computer face-down on a soft at 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 motherboard:
Step 1. Remove any media (disks, CDs, or memory cards) 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 “Left and right view”
and “Rear view” for help with locating the various connectors.
Step 4. Remove the computer cover. Refer to “Removing the computer cover”.
Step 5. Remove the hard disk drive. Refer to “Replacing the hard disk drive”.
34 IdeaCentre Q190Hardware Maintenance Manual