Chapter 1 "Important Safety Information" On; Air Circulation; Electrical Outlets And Cable Lengths - Lenovo ThinkCentre M90p Safety And Warranty Manual

if necessary, by turning off lights or using lower wattage bulbs. If you install the
monitor near a window, use curtains or blinds to block the sunlight. You can
adjust the brightness and contrast controls on the monitor as the room lighting
changes throughout the day.
Where it is impossible to avoid reflections or to adjust the lighting, an antiglare
filter placed over the screen might be helpful. However, these filters might affect
the clarity of the image on the screen; try them only after you have exhausted
other methods of reducing glare.
Dust buildup compounds problems associated with glare. Remember to clean
your monitor screen periodically using a soft cloth as directed in your monitor
documentation.

Air circulation

Your computer and monitor produce heat. The computer has a fan that pulls in
fresh air and forces out hot air. The monitor lets hot air escape through vents.
Blocking the air vents can cause overheating, which might result in a malfunction
or damage. Place the computer and monitor so that nothing blocks the air vents;
usually, 51 mm (2 inches) of air space is sufficient. Also, make sure the vented
air is not blowing on people.

Electrical outlets and cable lengths

The location of electrical outlets, the length of power cords and cables that
connect to the monitor, printer, and other devices might determine the final
placement of your computer.
When arranging your workspace:
• Avoid the use of extension cords. When possible, plug the computer power
cord directly into an electrical outlet.
• Keep power cords and cables neatly routed away from walkways and other
areas where they might get kicked accidentally.
For more information about power cords, see Chapter 1 "Important safety
information" on page 1.
16
ThinkCentre Safety and Warranty Guide