Lenovo ThinkCentre M57 Hardware Maintenance Manual - Page 123
input/output
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Removing the cover Important Read Chapter 2, "Safety information," on page 3 and "Handling electrostatic discharge-sensitive devices" on page 6 before opening the cover. This procedure describes how to remove the cover. 1. Shut down the operating system, remove any media (DVDs, CDs, or tapes) from the drives, and turn off all attached devices. 2. Unplug all power cords from electrical outlets. 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O) cables, and any other cables that are connected to the computer. 4. If there are thumb screws securing the cover, remove them. 5. Press the button on the left-side cover and slide the cover to the rear to remove. Chapter 9. Replacing FRUs - Tower Computers 117