Lenovo C40-05 Lenovo C40 Series All-In-One Computer Hardware Maintenance Manua - Page 45

Replacing the speaker system, Step 7. Remove the middle cover. Refer to Removing the middle cover.

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Step 13. Reattach the EMI cover, middle cover, stand holder, foot cover and stand base. Replacing the speaker system 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 speaker system: 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 stand holder. Refer to "Removing the stand holder". Step 7. Remove the middle cover. Refer to "Removing the middle cover". Step 8. Remove the EMI cover. Refer to "Removing the EMI cover". Step 9. Disconnect the speaker cables from the connector on the motherboard. Step 10. Remove the four screws that secure the speaker system to the chassis, then lift up the speaker system to remove it. Chapter 7. Replacing hardware 39

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Step 13. Reattach the EMI cover, middle cover, stand holder, foot cover and stand base.
Replacing the speaker system
Note:
Turnoffthecomputerandwait3to5minutestoletitcooldownbeforeremovingthecover.
Note:
It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo
recommendsthatyouuseablanket,towel,orothersoftclothtoprotectthecomputerscreenfromscratches
or other damage.
To replace the speaker system:
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 stand holder. Refer to “Removing the stand holder”.
Step 7. Remove the middle cover. Refer to “Removing the middle cover”.
Step 8. Remove the EMI cover. Refer to “Removing the EMI cover”.
Step 9. Disconnect the speaker cables from the connector on the motherboard.
Step 10. Remove the four screws that secure the speaker system to the chassis, then lift up the speaker
system to remove it.
Chapter 7
.
Replacing hardware
39