HP Pavilion Dv9400 Entertainment Notebook Pc Series Service Guide

Product Description
Maintenance and Service Guide 1–3
■TouchPad pointing device with on/off button and dedicated 
two-way scroll zone
■Integrated 10/100/1000 Gigabit Ethernet local area network 
(LAN) network interface card (NIC) with RJ-45 jack, varying 
by computer model
■Integrated high-speed 56K modem with RJ-11 jack
■Integrated wireless support for Mini Card IEEE 802.11a/b/g 
and 802.11b/g WLAN devices
■Support for ExpressCard
■External 90-watt AC adapter with 3-wire power cord
■8-cell Li-Ion...

1–4 Maintenance and Service Guide
Product Description
❏S-Video-out
❏Universal Serial Bus (USB) v. 2.0 (4 ports)
1.2 Resetting the Computer
If the computer you are servicing has an unknown password, 
follow these steps to clear the password. These steps also 
clear CMOS:
1. Prepare the computer for disassembly (refer to Section 5.3, 
“Preparing the Computer For Disassembly,” for more 
information).
2. Remove the real-time clock (RTC) battery (refer to
Section 5.7, “RTC Battery,” for more information).
3....

Product Description
Maintenance and Service Guide 1–5
1. 3 P o w e r  M a n a g e m e n t
The computer comes with power management features that 
extend battery operating time and conserve power. The 
computer supports the following power management features:
■Standby
■Hibernation
■Setting customization by the user
■Hotkeys for setting the level of performance
■Battery calibration
■Lid switch standby/resume
■Power button
■Advanced Configuration and Power Management (ACPM) 
compliance 

1–6 Maintenance and Service Guide
Product Description
1. 4 E x t e r n a l  C o m p o n e n t s
The external components on the front of the computer are shown 
below and described in Table 1-1.
Front Components
Table 1-1
Front Components
Item Component Function
1 Power light On: The computer is on.
Blinking: The computer is in standby.
Off: The computer is off or in hibernation.
2 Battery light On: A battery is charging.
Blinking: A battery that is the only available 
power source has reached a...

Product Description
Maintenance and Service Guide 1–73 Drive light Blinking: The hard drive or optical drive is 
being accessed.
4 Wireless switch Turns the wireless feature on or off, but 
does not create a wireless connection.
✎A wireless network must be set up in 
order to establish a wireless 
connection.
5 Wireless light Blue: An integrated wireless device, such 
as a wireless local area network (LAN) 
device and/or a Bluetooth® device, is 
turned on.
Amber: All wireless devices are turned off.
6...

1–8 Maintenance and Service Guide
Product Description
The external components on the left side of the computer are 
shown below and described in Table 1-2.
Left-Side Components
Table 1-2
Left-Side Components
Item Component Function
1 Security cable slot Attaches an optional security cable to the 
computer.
✎The security cable is designed to act 
as a deterrent, but it may not prevent 
the computer from being mishandled 
or stolen.
2 S-Video-out jack Connects an optional S-Video device such 
as a...

Product Description
Maintenance and Service Guide 1–94 Expansion port 3 Connects the computer to an optional 
expansion product.
✎The computer has only one 
expansion port. The term expansion 
port 3 describes the type of 
expansion port.
5 RJ-45 (network) jack Connects a network cable.
✎The RJ-45 (network) jack provides 
Gigabit Ethernet functionality.
6 RJ-11 (modem) jack Connects a modem cable.
7 HDMI port 
(select models only)Connects an optional audio or video device 
such as a high-definition...

1–10 Maintenance and Service Guide
Product Description
The external components on the right side of the computer are 
shown below and described in Table 1-3.
Right-Side Components 

Product Description
Maintenance and Service Guide 1–11
Table 1-3
Right-Side Components
Item Component Function
1 USB ports (2) Connect optional USB devices.
2 ExpressCard slot Supports optional ExpressCard/54 cards.
3 Optical drive Reads an optical disc.
4 Power connector Connects an AC adapter. 

1–12 Maintenance and Service Guide
Product Description
The computer keyboard components are shown below and 
described in Table 1-4.
Keyb oa rd  Comp on ent s