Lenovo S40–40 Hardware Maintenance Manual page 55

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 computer stand. Refer to "Removing the frame stand", "Removing the monitor stand",
or "Removing the transformer stand".
Step 5. Remove the rear cover. Refer to "Removing the rear cover".
Step 6. Remove the hinge fixing bracket. Refer to "Removing the hinge fixing bracket".
Step 7. Remove the motherboard cover. Refer to "Removing the motherboard cover".
Step 8. Remove the heat-sink. Refer to "Replacing the heat-sink".
Step 9. Remove the CPU. Refer to "Replacing the CPU".
Step 10. Remove the WLAN card. Refer to "Replacing the WLAN card".
Step 11. Unplug the following cables from connectors on the motherboard:
• Button board cable
• Speaker system cable
• LCD switch board cable
• Converter cable
• Camera cable
• System fan power cable
• Hard disk drive and optical disk drive power cable
• Hard disk drive SATA cable (Black)
• Optical drive SATA cable (Red)
• LVDS cable
.
Chapter 8 Replacing hardware
49