Lenovo ideapad 310-14IAP/ideapad 310-15IAP Hardware Mainte-nance Manual4• Always look carefully for possible hazards in your work area. Examples ofthese hazards are moist floors, nongrounded power extension cables, powersurges, and missing safety grounds.• Do not touch live electrical circuits with the reflective surface of a plasticdental mirror. The surface is conductive; such touching can cause personalinjury and machine damage.• Do not service the following parts with the power on when they are removedfrom their normal operating places in a machine:– Power supply units– Pumps– Blowers and fans– Motor generatorsand similar units. (This practice ensures correct grounding of the units.)• If an electrical accident occurs:– Use caution: do not become a victim yourself.– Switch off the power.– Send the victim to get medical aid.