Dell INSPIRON 2600 - Manual (Page 70)

Keyboard Status Lights — The green lights located above the keyboard indicate the following:
Touch Pad — Use the touch pad and touch pad buttons as you would use a mouse.
Touch Pad Buttons — Correspond to the left and right buttons on a standard mouse.
Device Status Lights
If the computer is connected to an electrical outlet, the light operates as follows:
l Solid green: The battery is fully charged.
l Flashing green: The battery is charging.
If the computer is running on a battery, the light operates as follows:
l Off: The battery is adequately charged (or the computer is turned off).
l Flashing orange: The battery charge is critically low.
l Solid orange: The battery charge is low.
Turns on when the numeric keypad is enabled
Turns on when the uppercase letter function is enabled
Turns on when the scroll lock function is enabled
Turns on when you turn on the computer or flashes when the computer is in standby mode
Turns on when the computer reads or writes data
NOTICE: To avoid loss of data, never turn off the computer while the light is flashing.
Turns on steadily or blinks to indicate battery charge status