Lenovo C40 Series, Hardware Maintenance Manual

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Step 10. Slide the rear deco upward to remove it.
Step 11. To reattach the rear deco:
a. Line up the rear deco with the guide track on the chassis.
b. Secure the rear deco to the chassis with the six screws.
Step 12. Reattach the optical drive, middle cover, stand holder, foot 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.
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 (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 stand base. Refer to “Removing the stand base”.
Step 5. Remove the foot cover. Refer to “Removing the foot cover”.
Step 6. Remove the memory modules. Refer to “Replacing a memory module”.
Step 7. Remove the stand holder. Refer to “Removing the stand holder”.
Chapter 7
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Replacing hardware
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