Sony VGN-S150 - Manual (Page 21)

About the Indicator Lights
21
About the Indicator Lights
Indicator Function
Power Turns on when the power to the computer is on, blinks in
Standby mode, and turns off when the computer is in Hibernate
mode or off.
Battery Turns on when the computer is using battery power, blinks
when the battery is running out of power, double-blinks when
the battery is charging.
Optical Drive Turns on when data is read from or written to the optical drive.
Do not enter Standby mode or turn off the computer when this
indicator is on.
Memory Stick® Turns on when data is read from or written to the Memory
Stick media. (Do not enter Standby mode or turn off the
computer when this indicator is on.) When the indicator is off,
the Memory Stick media is not being used.
Hard Disk Turns on when data is read from or written to the hard disk. Do
not enter Standby mode or turn off the computer when this
indicator is on.
Num Lock Press this key to activate the numeric keypad. Press it a second
time to deactivate the numeric keypad. The numeric keypad is
not active when the indicator is off.
Caps Lock Press this key to type letters in uppercase. Letters appear in
lowercase if you press Shift while the indicator is on. Press the
key a second time to turn off the indicator. Normal typing
resumes when the Caps Lock indicator is off.