Lenovo A540 All In One - Manual (Page 42)

Step 6. Remove the rear cover. Refer to “Removing the rear cover”.
Step 7. Remove the 2 screws that secure the transform board to the rear cover, and then lift it up to
remove it.
Step 8. Disconnect all the cables from the transform board.
Step 9. Lift up the Wi-Fi card to remove it from the transform board.
Step 10. To install the new transform board:
a. Install the Wi-Fi card to the new transform board.
b. Connect all the cables to the new transform board.
c. Secure the transform board to the rear cover with the screws.
Step 11. Reattach the rear cover to the LED panel.
Step 12. Reattach the hinge to the chassis, and reconnect the touch and LED panel cables back to the
motherboard.
Step 13. Reattach the base cover and secure it with the screws.
Replacing the Wi-Fi card
Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.
To replace the Wi-Fi card:
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.
36 Lenovo A540/A740Hardware Maintenance Manual