To Replace The Motherboard - 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 motherboard:

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. Remove the memory modules. Refer to Replacing the memory module.
Step 7. Remove the solid state drive. Refer to Replacing the solid state drive.
Step 8. Remove the heat-sink. Refer to Replacing the heat-sink.
Step 9. Remove the Wi-Fi card. Refer to Replacing the Wi-Fi card.
Step 10. Remove all the cables from the motherboard.
Step 11. Remove the eight screws that secure the motherboard to the chassis, and then lift the motherboard
up to remove it.
Step 12. To install the new motherboard:
a. Align the eight screw holes in the new motherboard with the screw holes in the chassis.
b. Secure the new motherboard to the chassis with eight screws.
c. Connect all the cables to the new motherboard.
Step 13. Install the following parts to the new motherboard:
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ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual