Dell Precision M90 - Manual (Page 3)

display — For more information about your display, see Using the Display .
power button — Press to turn on the computer or to enter or exit a power management mode. For more information on power management modes, see
Power Management Modes .
device status lights
If the computer is connected to an electrical outlet, the light operates as follows:
l Solid green: The battery is charging.
l Flashing green: The battery is almost fully charged.
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 low.
l Solid orange: The battery charge is critically low.
touch pad — Provides the functionality of a mouse.
touch-pad scroll zone — Provides the functionality of the scroll button on a mouse. A vertical scroll zone is located on the right side of the touch pad. A
horizontal scroll zone is located on the bottom of the touch pad.
media control buttons — Control CD, DVD, and Media Player playback.
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.
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.