HP Pavilion Dv9400 Entertainment Notebook Pc Series Service Guide

Removal and Replacement Procedures
Maintenance and Service Guide 5–65
4. Remove the four silver Phillips PM2.5×5.0 screws 1 that 
secure the ExpressCard assembly to the system board.
5. Slide the ExpressCard assembly 2 to the right to disconnect 
it from the system board.
6. Remove the ExpressCard assembly 3.
Removing the ExpressCard Assembly
Reverse the above procedure to install the ExpressCard assembly. 

5–66 Maintenance and Service Guide
Removal and Replacement Procedures
5.21 Top Cover Support Trim
1. Prepare the computer for disassembly (Section 5.3) and 
remove the following components:
❏Hard drive (Section 5.4)
❏Optical drive (Section 5.9)
❏Switch cover (Section 5.10)
❏Keyboard (Section 5.11)
❏Speaker assembly (Section 5.12)
❏Display assembly (Section 5.14)
❏Top cover (Section 5.15)
Top Cover Support Trim Spare Part Number Information
Top cover support trim 432978-001 

Removal and Replacement Procedures
Maintenance and Service Guide 5–67
2. Turn the computer upside down with the front toward you.
3. Remove the four Phillips PM2.5×8.0 screws that secure the 
top cover support trim to the computer.
Removing the Top Cover Support Trim Screws 

5–68 Maintenance and Service Guide
Removal and Replacement Procedures
4. Turn the computer right-side up with the front toward you.
5. Remove the Phillips PM2.5×8.0 screw 1 that secures the top 
cover support trim to the computer.
6. Remove the top cover support trim 2.
Removing the Top Cover Support Trim
Reverse the above procedure to install the top cover support trim. 

Removal and Replacement Procedures
Maintenance and Service Guide 5–69
5.22 Display Lid Switch Module
1. Prepare the computer for disassembly (Section 5.3) and 
remove the following components:
❏Hard drive (Section 5.4)
❏Optical drive (Section 5.9)
❏Switch cover (Section 5.10)
❏Keyboard (Section 5.11)
❏Speaker assembly (Section 5.12)
❏Display assembly (Section 5.14)
❏Top cover (Section 5.15)
❏Top cover support trim (Section 5.21)
Display Lid Switch Module Spare Part Number Information
Display lid switch...

5–70 Maintenance and Service Guide
Removal and Replacement Procedures
2. Remove the display lid switch module by firmly pulling it 
off the fan/heat sink assembly.
✎The display lid switch module is secured to the fan/heat sink 
assembly by 2-sided tape. Apply removal force to the middle 
of the module to remove it.
Removing the Display Lid Switch Module
✎The display lid switch module cable is included with the 
display lid switch module spare part kit and is also included in 
the Cable Kit, spare part...

Removal and Replacement Procedures
Maintenance and Service Guide 5–71
5.23 Power Connector Assembly
1. Prepare the computer for disassembly (Section 5.3) and 
remove the following components:
❏Hard drive (Section 5.4)
❏Optical drive (Section 5.9)
❏Switch cover (Section 5.10)
❏Keyboard (Section 5.11)
❏Speaker assembly (Section 5.12)
❏Display assembly (Section 5.14)
❏Top cover (Section 5.15)
Power Connector Assembly Spare Part Number Information
Power connector assembly (includes power connector assembly...

5–72 Maintenance and Service Guide
Removal and Replacement Procedures
2. Remove the two silver Phillips PM2.5×5.0 screws 1 that 
secure the power connector assembly bracket to the 
computer.
3. Remove the power connector assembly bracket 2.
Removing the Power Connector Assembly Bracket 

Removal and Replacement Procedures
Maintenance and Service Guide 5–73
4. Remove the silver Phillips PM2.5×5.0 screw 1 that secures 
the USB board to the computer.
5. Remove the USB board 2.
6. Disconnect the USB board cable 3 from the USB board and 
remove the cable from the clips 4 in the base enclosure.
✎The USB board cable is included with the USB board spare 
part kit and is also included in the Cable Kit, spare part number 
434677-001.
Removing the USB Board 

5–74 Maintenance and Service Guide
Removal and Replacement Procedures
7. Remove the black Phillips PM2.5×5.0 screw 1 that secures 
the power connector assembly to the computer.
8. Remove the power connector assembly 2 from its location 
in the base enclosure.
Releasing the Power Connector Assembly
Reverse the above procedure to install the USB board and power 
connector assembly.