Juniper Systems Allegro DOS Manual - Manual (Page 35)

Hardware Features Page 2-17
LED Indicators
The following LED indicators are located above the display:
These indicators are active while the Allegro is running, providing you
with the following information:
LED Description
Battery Charge Status: shows the percent of charge
remaining in the batteries
External Power: indicates that you are connected to an
external power source and not drawing power from
the internal batteries
Charging Indicator: lights up while the rechargeable
batteries are charging
Solid State Disk Access: flashes when data are being
read from or written to the solid state disk
PC Card Access: indicates that your application
program is accessing the PC card (do not remove it
when this light is flashing)
A special circuit is implemented in the Allegro to reduce the amount of
power required to light these indicators.
Brightness Adjustment
The brightness of the LED indicators can be set to dim, medium, or
bright. This adjustment is made from the Control Panel|Display
Properties|Options in Windows CE and the System Setup Program,
Keyboard/Display Screen in DOS.