Lenovo A540 All In One - Manual (Page 46)

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 camera to the front bezel.
Step 8. Lift up the camera and disconnect the data cable from the camera.
Step 9. To install the new camera:
a. Connect the data cable to the new camera.
b. Line up the holes in the new camera with the mounting holes on the LED panel and secure
it with the 3 screws.
Step 10. Reattach the rear cover to the LED panel.
Step 11. Reattach the hinge to the chassis, and reconnect the touch and LED panel cables to the
motherboard.
Step 12. Reattach the base cover and secure it with the screws.
Replacing the LED panel
Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.
40 Lenovo A540/A740Hardware Maintenance Manual