Lenovo Notebook Computer User Guide
computer. Using the wrong adaptor might damage your computer.
Caution: The AC adaptor can automatically adjust to any voltage from 100 to 240 volts, as well as a frequency of either 50 or 60 hertz, thus enabling you to use the computer in almost any region. The Power Jack and power cord jack might vary in different countries and/or regions. Make sure that the AC adaptor is correctly connected to the power source. A wrong connection can damage your computer and result in a fire accident.
1.1.3Fan louvers
The internal Fan Louvers enable air to circulate in the computer and
cool the Central Processor.
Hint: Your notebook switches on the fan when the Central Processor becomes hot. The operation of the fan might cause some noises, which is a normal situation.
Caution: To avoid compromising ventilation, do not place any obstacle in front of the fan.
1.1.4LAN port, Modem jack 
1.1.4.1LAN port
The RJ‐45 network jack allows you to connect your computer to a
local area network (LAN).
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