Lenovo ThinkCentre M83 Hardware Maintenance Manual page 247

This section provides instructions on how to install or remove the ac power adapter.
To install the ac power adapter, connect the ac power adapter to the ac power adapter connector at the
rear of your computer and a workable electrical outlet. Secure the power cord into the power adapter
cable loop at the rear of the computer as shown.
Figure 221. Connecting the ac power adapter
To remove the ac power adapter, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
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Chapter 10 Replacing FRUs (machine types: 10A4, 10A5, 10AA, 10AB, 10DF, 10DG, 10DH, 10DJ, 10E8, 10E9, 10EA, and 10EB)