Lenovo C225 All-In-One - Manual (Page 42)

Step 8. Remove the 11screws (C220 /C225 ) /10 screws (C320/C325) that secure the EMI cover to the
chassis and lift the cover up to remove.
For models C220 and C225 refer to the below illustration.
For model C320/C325 refer to the below illustration.
Replacing the system fan
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 system fan(C225/C325/C320)
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.
38 Lenovo C2/C3 Hardware Maintenance Manual