Lenovo IdeaCentre A720 - Manual (Page 56)

Step 7. Put the head of a flat head screwdriver between the middle frame and the rear cover as shown.
Then using the screwdriver as a lever and the middle frame metal bar as the fulcrum, prise the rear
cover away from the middle frame.
1
F ulcrum
Le ve r
1
Step 8. Working around the edge in an anti-clockwise direction, use your fingers to prise up the rear cover.
The rear cover is pinned into place, use short, sharp movements to prise it up.
2
2
Step 9. Press down the hinge and slide out the rear cover.
Step 10. To reattach the rear cover:
a. Raise the hinge, line up the rear cover with the LED panel and slide it back into position.
b. Press the edge of rear cover to lock the cover to the LED panel with the pins.
c. Slide the rear deco back into position.
Step 11. Reattach the hinge to the chassis, and reconnect the touch and LED panel cables back to the
motherboard.
Step 12. Reattach the base cover and secure it with the screws.
Replacing the scalar board
Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.
To replace the scalar 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.
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 base cover. Refer to “Removing the base cover”.
Step 5. Remove the hinge from the chassis. Refer to “Removing the hinge from the chassis”.
Step 6. Remove the rear cover. Refer to “Removing the rear cover”.
Step 7. Remove the 3 screws that secure the scalar shielding to the middle frame.
50 IdeaCentre A720Hardware Maintenance Manual