Lenovo IdeaPad Y450 - Manual (Page 44)

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Chapter 3. Using external devices
Your computer has many built-in features and connection capabilities.
Attention:
Do not connect or disconnect any external device cables other than USB,
eSATA and 1394 cables while the computer power is on; otherwise, you
might damage your computer. To avoid possible damage to attached
devices, wait at least five seconds after the computer is shut down to
disconnect external devices.
Connecting a Universal Serial Bus (USB) device - - - - - - - -
Your computer comes with USB ports compatible with USB devices such as
a keyboard, mouse, camera, external hard disk drive, printer and scanner.
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Y450 UserGuide V2.0 EN.book Page 35 Thursday, May 14, 2009 5:23 PM