Lenovo C240 All-in-One - Manual (Page 42)

Step 5. Disconnect the antenna and data cables from the Wi-Fi card. 1
Step 6. Remove the screw that secures the Wi-Fi card to the motherboard. 2
Step 7. Pull the Wi-Fi card upward to remove it from the socket. 3
1
2
3
Step 8. To install the new Wi-Fi card:
a. Insert the new Wi-Fi card into the card port and secure it with the screw.
b. Connect the antenna cables to the new Wi-Fi card.
Step 9. Reattach the rear cover and secure it with the screws.
Replacing the speaker system
Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the rear cover.
To replace the speaker system:
Step 1. Remove any media (disks, CDs, DVDs, 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 rear cover. Refer to "Removing the rear cover".
36 Lenovo C240/245/255 All-In-One PC Hardware Maintenance Manual