Lenovo C225 All-In-One - Manual (Page 52)

For models C320 and C325 refer to the below illustration. (3 screws)
Step 12. Line the new I/O module up then slide it into the metal bracket.
Step 13. Line the new I/O module and metal bracket up with the chassis then secure it with the screws.
Step 14. Connect the power cable to the motherboard and TV antenna cable(s) to the TV tuner card.
Step 15. Reattach the EMI cover, the computer cover, the speaker cover, the hard disk drive cover and
the optical disk drive.
Replacing the speaker system
Note: Turn off the computer and wait 3 to 5 minutes to let the computer cool down before removing the
computer 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, 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 optical drive. Refer to “Replacing the optical drive”.
Step 5. Remove the hard disk drive cover. Refer to “Replacing the hard disk drive”.
Step 6. Remove the speaker cover. Refer to “Removing the speaker cover”.
Step 7. Remove the computer cover. Refer to “Removing the computer cover”.
Step 8. Remove the EMI cover. Refer to “ Removing the EMI Cover”.
Step 9. Remove the 4 screws that secure the speakers to the chassis, disconnect the data cables from the
motherboard and lift up the speakers to remove.
48 Lenovo C2/C3 Hardware Maintenance Manual