HP Pavilion Dv9400 Entertainment Notebook Pc Series Service Guide

Removal and Replacement Procedures
Maintenance and Service Guide 5–15
5.7 RTC Battery
1. Prepare the computer for disassembly (refer to Section 5.3).
2. Remove the memory module compartment cover
(Section 5.6).
3. Disconnect the RTC battery cable 1 from the system board.
4. Remove the RTC battery 2.
✎The RTC battery is secured to the computer by 2-sided tape. 
All replacement RTC battery spare part kits include 
2-sided tape.
Removing the RTC Battery
Reverse the above procedure to install the RTC...

5–16 Maintenance and Service Guide
Removal and Replacement Procedures
5.8 Mini Card Module
Mini Card Module
Spare Part Number Information
For use only with models using Intel processors:
802.11a/b/g WLAN Mini Card module for use in the MOW1 
countries and regions listed below:407674-001
Antigua & 
Barbuda
Argentina
Australia
Bahamas
BarbadosCanada
Chile
Dominican 
Republic
Guam
GuatemalaPanama
India
Indonesia
Malaysia
Mexico
New ZealandParaguay
Saudi Arabia
Ta i w a n
The United States
Vietnam...

Removal and Replacement Procedures
Maintenance and Service Guide 5–17
1. Prepare the computer for disassembly (Section 5.3).
2. Remove the memory module compartment cover
(Section 5.6).
802.11a/b/g WLAN Mini Card module for use in the ROW 
countries and regions listed below:407674-003
China
Ecuador
HaitiHonduras
Pakistan
Per uQatar
South KoreaUruguay
Venezuela
802.11b/g WLAN Mini Card module for use in Costa Rica, 
Israel, Kuwait, Thailand, UAE, Ukraine.407674-004
802.11a/b/g WLAN Mini Card module for...

5–18 Maintenance and Service Guide
Removal and Replacement Procedures
3. Make note of which wireless antenna cable is attached to 
which antenna clip on the Mini Card module before 
disconnecting the cables. Then disconnect the cables 1 from 
the module.
4. Remove the two Phillips PM2.0×11.0 screws 2 that secure 
the Mini Card module to the computer. (The edge of the 
module opposite the socket rises away from the computer).
5. Remove the module 3 by pulling it away from the socket at 
an angle.
✎Mini...

Removal and Replacement Procedures
Maintenance and Service Guide 5–19
5.9 Optical Drive
1. Prepare the computer for disassembly (Section 5.3).
2. Remove the Phillips PM2.5×8.0 screw 1 that secures the 
optical drive to the computer.
3. Insert a thin tool, such as a paper clip 2, into the media tray 
release hole. (The optical drive media tray releases from the 
optical drive.)
4. Use the media tray frame to slide the optical drive 3 out of 
the computer.
Optical Drive Spare Part Number Information...

5–20 Maintenance and Service Guide
Removal and Replacement Procedures
5. Remove the optical drive.
Removing the Optical Drive
6. Position the optical drive with the optical drive bracket 
toward you.
7. Remove the two Phillips PM2.0×3.0 screws 1 that secure the 
optical drive bracket to the optical drive. 

Removal and Replacement Procedures
Maintenance and Service Guide 5–21
8. Remove the optical drive bracket 2.
Removing the Optical Drive Bracket
Reverse the above procedure to reassemble and install the 
optical drive. 

5–22 Maintenance and Service Guide
Removal and Replacement Procedures
5.10 Switch Cover
1. Prepare the computer for disassembly (Section 5.3).
2. Close the computer.
3. Turn the computer upside down with the front panel 
toward you.
4. Remove the six Phillips PM2.0×5.0 screws that secure the 
switch cover to the computer.
Switch Cover Spare Part Number Information
Switch cover (includes LED board and LED 
board cable), for model dv9000
Switch cover (includes LED board and LED 
board cable), for model...

Removal and Replacement Procedures
Maintenance and Service Guide 5–23
Removing the Switch Cover Screws 

5–24 Maintenance and Service Guide
Removal and Replacement Procedures
5. Turn the computer display-side up with the front toward you.
6. Open the computer as far as possible.
7. Lift the rear edge of the switch cover and swing it forward 
until it rests on the keyboard.
Releasing the Switch Cover