Replacing the front control board – Lenovo C355 All-in-One User Manual
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Step 11. Remove the screw that secures the WLAN card to the motherboard.
1
Step 12. Lift up the WLAN card to remove it from the socket.
2
Step 13. To install the new WLAN card:
a.
Insert the notched end of the WLAN card into the card port on the motherboard.
b.
Secure new the WLAN card to the motherboard with the screw.
c.
Connect the antenna cables to the new WLAN card.
Step 14. Reattach the EMI cover, middle cover, optical drive, stand holder, foot cover and stand base.
Replacing the front control board
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 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 front control board:
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.
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Lenovo C355/C455 All-In-One ComputerHardware Maintenance Manual