To Replace The Side Usb Board; Replacing The Motherboard; To Install The New Side Usb Board - Lenovo ideacentre AIO 520-24 IKL Hardware Maintenance Manual

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 side USB board:

Step 1. Remove any media 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 Locating connectors,
controls and components to locate the various connectors.
Step 4. Remove the stand base. Refer to Removing the stand base.
Step 5. Remove the rear cover. Refer to Removing the rear cover.
Step 6. Disconnect the antenna cables from the side USB board.
Step 7. Remove the screw that secures the side USB board to the bottom frame.
Step 8. Lift up the side USB board.
Step 9.

To install the new side USB board:

a. Insert the new side USB board into the side USB board slot.
b. Secure the new side USB board to the bottom frame with the screw.
c. Connect the antenna cables to the new side USB board.
Step 10. Reattach the rear cover and stand base.

Replacing the motherboard

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.
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Chapter 8 Replacing hardware
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