Lenovo ThinkCentre E51 Hardware Maintenance Manual - Page 91
Removing the covers
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Removing the covers Important Read Chapter 2, "Safety information," on page 3 and "Handling electrostatic discharge-sensitive devices" on page 6 before opening the cover. Some FRU replacements require the removal of only the left-side cover. Others require removal of both the left-side and the right-side covers. 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. Remove the two thumb screws at the rear of the left-side cover and slide the cover to the rear to remove. 5. If necessary, remove the right-side cover in the same manner. Chapter 8. Replacing FRUs (Tower computers) 85