Sony PCG-FXA63 Manual

Power 

Lights up when the power to the computer is turned on, flashes in Standby mode, and turns off when the

computer is in Hibernate mode or powered off. 
Battery 

Lights up when the computer is using battery power, flashes when the battery is running out of power,

double-flashes when the battery is charging. 
Hard disk 

Lights up when data is read from or written to the hard disk drive. Do not enter Standby mode or turn off the

computer when this indicator light is on. 
Num Lock 

Lights up when the number keys area in the numeric keypad are active. When the indicator is off, the

alphanumeric character keys in the keypad area are active. 
Caps Lock 

Lights up when the letters appear in uppercase as you type. The Shift key lowers the case of typed letters

when Caps Lock is on. When the indicator is off, the letters appear in lower case as you type (unless you hold down the
Shift key). 
Scroll Lock 

Lights up when the screen scrolls differently. (Exactly how it scrolls depends on the specific application. This

function does not work with all applications.) When the indicator is off, information moves across the display normally.