Lenovo IdeaCentre A520 All-in-One - Manual (Page 51)

Step 11. Remove the 7 screws that secure the motherboard to the chassis and slide it out as shown.
Step 12. Remove the 2 screws that secure the TV-Tuner card to the motherboard.
Step 13. Disconnect the antenna cable(s) from the TV-Tuner card.
Step 14. Pull the TV-Tuner card upward to remove it from the card port.
Step 15. To install the new TV-Tuner card:
a. Insert the notched end of the TV-Tuner card into the card port.
b. Secure the new TV-Tuner card to the motherboard with the 2 screws.
c. Connect the antenna cable(s) to the new TV-Tuner card.
Step 16. Line up the motherboard with the chassis and slide it into position. Align the holes on the
motherboard with the mounting holes on the chassis and secure the motherboard to the chassis
with the 7 screws.
Step 17. Reattach the speaker system, optical drive, heat-sink, system fan, and hard disk drive to the
motherboard.
Step 18. Reconnect all the cables to the motherboard.
Step 19. Reattach the base cover and secure it with the screws.
Chapter 8 . Replacing hardware 45