Sony VGC-LS1 - Manual (Page 26)

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Using Your VAIO Computer
To connect the wireless keyboard
1 Insert the supplied four AA batteries (1) into the battery compartment (2) on the bottom of the wireless keyboard.
2 Turn on the computer.
3 Slide the POWER switch (3) at the top of the keyboard to the ON position.
4 Press the CONNECT button (4) on the back of the computer.
5 Press the CONNECT button (5) on the bottom of the keyboard.
The connect indicator turns on in the indicator window on the keyboard when connection is established between the
computer and the keyboard. If not, repeat the procedure.
!
Steps 4 and 5 must be completed within 10 seconds of each other.
If the wireless keyboard is left unused for 20 minutes or longer, the connect indicator will turn off. This could indicate that the connection between
your computer and the keyboard is lost. Press the Fn key to check that the connect indicator turns on before using the keyboard.