Lenovo THINKCENTRE 4473 - Manual (Page 101)

3. Turn off the computer and all attached devices. Your hard disk drive automatically parks the read/write
head in a nondata area. This prevents damage to the hard disk drive.
4. Unplug the power cords from electrical outlets.
5. Disconnect communication cables, such as modem or network cables, from the outlets first, and then
disconnect the other ends from the computer.
6. Note where any remaining cables are attached to the computer; then, remove them.
7. If you saved the original shipping cartons and packing materials, use them to pack the units. If you are
using different cartons, cushion the units to avoid damage.
Chapter 9 . Preventing problems 87