Lenovo C360 All-in-One - Manual (Page 55)

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User Guide
Replacing the adapter
Attention: Turn off the computer and wait 3 to 5 minutes to let it cool
down before removing the cover.
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.
2. Disconnect the adapter cable from the computer, then unplug the power cord
from the electrical outlet.
3. Connect the new adapter as shown.