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.
Disconnect the hard disk drive power and data cables from the motherboard.
Step 9.
Remove the screws that secure the EMI cover to the chassis and lift the cover up to remove it.
For models C220 and C225 refer to the illustration below. (11 screws)
For models C320 and C325 refer to the illustration below. (10 screws)
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Lenovo C2/C3 SeriesHardware Maintenance Manual