Sony VAIO PCG-V505CP Hardware Manual page 5

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Connectivity
Never install modem or telephone wiring during a severe lightning storm.
Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations.
Take care when installing or modifying telephone lines.
Use your computer only with the supplied AC adapter. To disconnect your computer completely from
mains voltage, unplug the AC adapter.
Make sure that the socket outlet is easily accessible.
Never touch uninsulated telephone wire or terminals unless the telephone line has been disconnected
at the network interface.