Sony PCV-V1/D Hardware Manual page 19

Using your VAIO
Keyboard information
You can check your keyboard's current settings and battery power level by clicking
icon), located on the Windows taskbar.
Caps Lock
Num Lock
Scroll Lock
Turns on when the letters appear in uppercase as you type. The
<Shift> key lowers the case of typed letters when Caps Lock is on.
Turns off when the letters appear in lowercase as you type (unless
you hold down the <Shift> key).
Turns on when the number keys in the numeric keypad are active.
Turns off when the alphanumeric character keys in the keypad
area are active.
Turns on when the screen scrolls differently (not all applications
support this function).
Turns off when the information moves across the display normally.
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(Wireless Keyboard