Dell Inspiron 4000 Service Manual page 58

The light labeled turns on steadily or blinks to indicate the battery charge status. Indicator states include:
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Off, which indicates that the computer is operating on AC power
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Flashing green, which indicates that the battery is charging
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Solid green, which indicates that the battery is fully charged
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NOTICE: To avoid data loss, never turn off the computer while the green light labeled
Touch Pad
The touch pad detects the position of your finger over a touch-sensitive area and provides the computer with full mouse functionality.
Modular Bay
You can install devices such as a floppy drive, CD drive, DVD drive, CD- RW drive, Zip drive, second hard drive, second battery, or Dell TravelLite™ travel module
in the modular bay.
Display Latch Button
Press the display latch button to unlock the display.
Battery Bay
With a battery in this bay, you can use the computer without plugging it into the electrical outlet.
Touch Pad/Track Stick Buttons
These buttons correspond to the left and right buttons on a standard mouse.
Power Button
HINT: To turn off your computer, perform a Windows shutdown.
Press the power button to turn on the computer or to initiate standby mode.
If the computer stops responding, press and hold the power button until the computer turns off completely (this may take several seconds).
Left Side View
is flashing.