v Do not touch live electrical circuits with the reflective surface of a plastic dental

mirror. The surface is conductive; such touching can cause personal injury and
machine damage.

v Do not service the following parts with the power on when they are removed

from their normal operating places in a machine:

Power supply units

Pumps

Blowers and fans

Motor generators

and similar units. (This practice ensures correct grounding of the units.)

v If an electrical accident occurs:

Use caution; do not become a victim yourself.

Switch off power.

Send another person to get medical aid.

4 ThinkPad T500 and W500 Hardware Maintenance Manual