HP ProBook 4321s Notebook-PC - Manual (Page 15)

Lights
NOTE: Refer to the illustration that most closely matches your computer.
Component Description
(1) TouchPad off indicator ● Amber: The TouchPad is off.
● Off: The TouchPad is on.
(2) Caps lock light On: Caps lock is on.
(3) HP QuickLook light Blinking: QuickLook is being opened or closed.
(4) HP QuickWeb light Blinking: The Web browser is being opened or closed.
Identifying hardware 3