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Maintenance and Service Guide 1–29
3 Wireless button Enables/disables an internal wireless
device.
Wireless light On: an integrated wireless device is
hardware enabled.
4 Power button When the computer is
■ Off, press to turn on the computer.
■ On, briefly press to initiate Hibernation.
■ In Standby, briefly press to resume
from Standby.
■ In Hibernation, briefly press to restore
from Hibernation.
Power light ■ On: Computer is turned on.
■ Blinking: Computer is in standby.
■ Off: Computer is off.
5 Volume down button Decreases system volume.
6 Volume mute button Mutes or restores volume.
Mute light On: Volume is muted.
7 Volume up button Increases system volume.
8 Num lock light On: Num lock or the internal keypad is on.
Table 1-12
Top Components, Part 1
HP Compaq nx4820 and Compaq Presario V2400
(Continued)
Item Component Function