Dell Inspirion 510m Owner's Manual page 21

If the computer stops responding, press and hold the power button until the computer turns off completely
(which may take several seconds).
D E V I C E S T A T U S L I G H T S
Turns on when you turn on the computer and blinks when the computer is
in a power management mode.
Turns on when the computer reads or writes data.
Turns on steadily or blinks to indicate battery charge status.
Turns on when Bluetooth™ technology is enabled.
NOTE:
ordered Bluetooth with your computer. For more information, see the
documentation that came with your Bluetooth technology.
To turn off only the Bluetooth functionality, right-click the
notification area and select Disable Bluetooth Radio.
To quickly enable or disable all wireless devices, press <Fn><F2>.
20
A Tour of Your Computer
NOTICE:
To avoid loss of data, never turn off the computer while the
light is flashing.
Bluetooth is an optional feature, so the light turns on only if you
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