Lenovo ThinkPad W500 4061 Hardware Maintenance Manual page 12

v Do not touch live electrical circuits with the reflective surface of a plastic dental
v Do not service the following parts with the power on when they are removed
v If an electrical accident occurs:
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ThinkPad T500 and W500 Hardware Maintenance Manual
mirror. The surface is conductive; such touching can cause personal injury and
machine damage.
from their normal operating places in a machine:
– Power supply units
– Pumps
– Blowers and fans
– Motor generators
– Similar units to listed above
This practice ensures correct grounding of the units.
– Use caution; do not become a victim yourself.
– Switch off power.
– Send another person to get medical aid.