Lenovo Ideapad 300-14IBR User Manual page 13

 Connecting network cables
To insert a network cable, do the following:
1
Hold one connector of the network cable to press the RJ-45 cover down gently
2
Insert the connector into the RJ-45 port
Software configuration
Consult your Internet Service Provider (ISP) for details on how to configure your computer.
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Chapter 1. Getting to know your computer
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