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Step 5. Disconnect the 2 antenna cables from the WLAN card. 1
Step 6. Remove the screw that secures the WLAN card to the motherboard. 2
Step 7. Pull the WLAN card upward to remove it from the card port.
1
2
Step 8. Line up the new WLAN card, then insert it into the card port and secure it to the motherboard
with the screw.
Step 9. Connect the 2 antenna cables to the new WLAN card.
Step 10. Reattach the computer cover.
Replacing the heat-sink
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 heat-sink:
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 system fan. Refer to “Replacing the system fan”.
32 IdeaCentre Q190Hardware Maintenance Manual