Sony PCG-NV190P VAIO User Guide (primary manual) User Manual page 7

Indicator lights
Light On
Num Lock
The number keys in the numeric keypad are active.
active.
Caps Lock
The letters appear in uppercase as you type. The Shift key lowers the case of typed letters when Caps Lock is on.
Letters appear in lower case as you type (unless you hold down the Shift key).
Scroll Lock
The screen scrolls differently. (Exactly how it scrolls depends on the specific application. It has no effect in many
applications.)
Off
The alphanumeric character keys in the keypad area are
Information moves across the display normally.
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