HP ProBook 4720s Notebook-PC - Manual (Page 12)

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) E-mail client light Blinking: Launching Evolution e-mail client.
(4) Web browser light Blinking: Launching Firefox browser.
2 Chapter 1 Features