HP Compaq Presario,Presario 5116 Quick Start Manual page 43

The system lights on the
keyboard provide a quick
status of your computer
and keyboard settings.
Post Office Protocol (POP) is
a commonly used messaging
protocol. The most widely
used implementation of this
protocol is POP3. POP3 is a
retrieval protocol, used to
retrieve mail messages from a
POP server. E-mail messages
received by the POP server
are delivered to a server
mailbox and messages reside
there until you retrieve them.
The system status lights are shown in the following illustration,
and the function of each light is explained.
No.
1
E-mail indicates when you have e-mail waiting to be read.
See details below.
Note: This light only works with POP3 Internet services. Some
ISPs do not support this functionality.
2
Sleep indicates the computer is in the sleep mode.
3
Num Lock indicates that you can use the numeric key pad to type
numbers.
4
Caps lock indicates all text typed will appear as capitalized letters.
5
Scroll lock indicates when the scroll-lock function is engaged,
allowing you to scroll through a document without moving the
cursor.
Description