IBM W520 User Manual
DANGER
Unless hot swap is allowed for the FRU being replaced, do as follows before removing it: power off the
computer, unplug all power cords from electrical outlets, remove the battery pack, and disconnect any
interconnecting cables.
computer, unplug all power cords from electrical outlets, remove the battery pack, and disconnect any
interconnecting cables.
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ThinkPad T520, T520i, and W520 Hardware Maintenance Manual