2-12 User’s Manual
TECRA A10/S10/M10/SatellitePro S300
Indicators
This section explains indicator functions.
System indicators
LED system indicators next to their respective icons, glow when specific 
computer operations are in progress.
Figure 2-7 System indicators
Bluetooth antenna Some computers in this series are equipped with 
a Bluetooth antenna.
Wireless LAN 
antennas
Some computers in this series are equipped with 
the Wireless LAN antennas.
Wireless WAN 
antennas
Some computers in this series are equipped with 
the Wireless WAN antennas.
DC IN The DC IN indicator normally glows green when 
power is being correctly supplied from the AC 
power adaptor. However, If the output voltage 
from the adaptor is abnormal, or if the computer’s 
power supply malfunctions, this indicator will 
flash orange.
Power The Power indicator normally glows green when 
the computer is turned on. However, if you turn 
the computer off into Sleep Mode, this indicator 
will flash orange - approximately one second on, 
two seconds off - both while the system is 
shutting down and while it remains turned off.
Battery The Battery indicator shows the condition of the 
battery’s charge - green indicates the battery is 
fully charged, orange indicates the battery is 
charging, and flashing orange indicates a low 
battery condition. Please refer to Chapter 6, 
Power and Power-Up Modes for more 
information on this feature.
Hard Disk Drive/
Optical Disc Drive
The Hard Disk Drive/Optical Disc Drive 
indicator glows green whenever the computer is 
accessing the built-in hard disk drive, optical disc 
drive or eSATA device.