Replacing The Power Supply - Lenovo 6176 Hardware Maintenance Manual

Replacing the power supply

This procedure describes how to remove and replace the power supply.
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Hardware Maintenance Manual
Attention
Never remove the cover on a power supply or any part that has the
following label attached.
Hazardous voltage, current, and energy levels are present inside any
component that has this label attached. There are no servicable parts inside
these components.
1. Remove any media (diskettes, CDs, or tapes) from the drives, shut down your
operating system, and turn off all attached devices and the computer.
2. Unplug all power cords from electrical outlets.
3. Disconnect the cables attached to the computer. This includes power cords,
input/output (I/O) cables, and any other cables that are connected to the
computer. See "Front connectors" on page 150 and "Rear connectors" on page
151.
4. Remove the four screws at the rear of the chassis that secure the power
supply.
5. Open the computer cover. See "Opening the cover" on page 154.