Compaq notebook m300 stripdown User Manual

							Removal and Replacement Procedures    5-21
5.
 Position the computer so the front faces forward.
6.
 Open the computer as far as it will open.
7.
 Swing the back edge of the switch cover forward 

 (Figure 5-19).
8.
 When the switch cover disengages from the base assembly, remove the cover 
.
Figure 5-19.
  Removing the Switch Cover
Reverse the above procedure to install the switch cover. 
						

							5-22    Removal and Replacement Procedures
5.14  Display Assembly
1.
 Prepare the computer for disassembly (Section 5.5).
2.
 Remove the keyboard (Section 5.11).
3.
 Remove the switch cover (Section 5.13).
4.
 Use the connector removal tool to disconnect the inverter cable 

 from the system
board (Figure 5-20)
.
5.
 Use the connector removal tool to disconnect the microphone cable 
 and the video
cable 

 from the system board.
6.
 Remove display screw covers from the hinges connecting the display assembly to
the base assembly.
7.
 Remove the four screws (two on each hinge)  that secure the display assembly to
the base assembly.
 NOTE:  
When these four screws are removed, the display assembly is unsupported.
Make sure to support the display assembly when removing these screws.
8.
 Remove the display assembly.
Figure 5-20.
  Removing the Display Assembly
Reverse the above procedure to install the display. 
						

							Removal and Replacement Procedures    5-23
5.15  Top Cover with TouchPad
NOTE:  
The power button and infrared lens are easily dislodged when the top cover is
removed. Make note of their location and orientation before removing the top cover.
1.
 Prepare the computer for disassembly (Figure 5.5).
2.
 Remove the keyboard (Section 5.11).
3.
 Remove the switch cover (Section 5.13).
4.
 Remove the display assembly (Section 5.14).
5.
 Turn the computer upside down with the rear panel facing forward.
6.
 Remove the seven screws from the bottom of the computer (Figure 5-21).
7.
 Remove the four screws from the back of the computer.
Figure 5-21.
  Removing the Top Cover Screws 
						

							5-24    Removal and Replacement Procedures
8.
 Turn the computer right side up with the front facing forward.
9.
 Use the connector removal tool to disconnect the TouchPad cable 

 from the system
board (Figure 5-22).
10.
 Press in on the front of the top cover at the highlighted area , and swing the front
edge of the cover up and away from the base assembly 

.
11.
 Remove the top cover.
.
Figure 5-22.
  Removing the Top Cover
Reverse the above procedure to install the top cover.  Make sure the power switch and
infrared lens are replaced in their appropriate locations before attempting to install the
top cover. 
						

							Removal and Replacement Procedures    5-25
5.16  Voltage Converter Board
NOTE:
 When removing the voltage converter board from the system board, be careful of
the connectors on the right side of the voltage converter board.
1.
 Prepare the computer for disassembly (Section 5.5).
2.
 Remove the keyboard (Section 5.11).
3.
 Remove the switch cover (Section 5.13).
4.
 Remove the display assembly (Section 5.14).
5.
 Remove the top cover (Section 5.15).
6.
 Remove the two screws 

 that secure the voltage converter board to the system
board (Figure 5-23).
7.
 Lift up the left side of the voltage converter 
 until it clears the left edge of the base
assembly.
8.
 Pull the voltage converter board to the left to disconnect it from the system board 
.
Figure 5-23.
  Removing the Voltage Converter Board
Reverse the above procedure to install the voltage converter board.  Make sure to attach
the connectors on the right side of the board to the system board first. 
						

							5-26    Removal and Replacement Procedures
5.17  Modem Connector Board
1.
 Prepare the computer for disassembly (Section 5.5).
2.
 Remove the modem or modem/NIC card (Section 5.9).
3.
 Remove the keyboard (Section 5.11).
4.
 Remove the switch cover (Section 5.13).
5.
 Remove the display assembly (Section 5.14).
6.
 Remove the top cover (Section 5.15).
7.
 Remove the two screws that secure the modem connector board 

 to the system
board (Figure 5-24).
8.
 Lift up on the modem connector board 
 to disconnect it from the system board.
9.
 Remove the modem connector board.
Figure 5-24.
  Removing the Modem Connector Board
Reverse the above procedure to install the modem connector board. 
						

							Removal and Replacement Procedures    5-27
NOTE: 
When installing the modem connector board, make sure the fan cable is routed
between the connector and the modem connector area (Figure 5-25). Do not route the
cable next to the heat sink.
Figure 5-25.
  Routing the Fan Cable 
						

							5-28    Removal and Replacement Procedures
5.18  PC Card Assembly
IMPORTANT:  
There are different-sized screws securing the PC Card assembly to the
system board. Make note of the location of these screws.
1.
 Prepare the computer for disassembly (Section 5.5).
2.
 Remove the modem or modem/NIC card (Section 5.9).
3.
 Remove the keyboard (Section 5.11).
4.
 Remove the switch cover (Section 5.13).
5.
 Remove the display assembly (Section 5.14).
6.
 Remove the top cover (Section 5.15).
7.
 Remove the modem connector board (Section 5.17).
8.
 Remove the two silver screws 

 on the left side of the PC Card assembly (Figure 5-
26)
.
9.
 Remove the black screw 
 securing the front of the PC Card assembly to the base
assembly.
10.
 Lift the left side of the PC Card assembly 
 to disconnect it from the system board.
Figure 5-26.
  Removing the PC Card Assembly
Reverse the above procedures when installing the PC Card assembly.
IMPORTANT:
 Be sure to route the audio and light board cables between the PC Card
assembly and the base plastic.  Do not route the cables near the heat sink. 
						

							Removal and Replacement Procedures    5-29
5.19  System Board
IMPORTANT:  
There are different-sized screws securing the system board to the base
enclosure. Make note of the location of these screws. Also, when the system board is
removed, components of the base enclosure may come loose. Note the location and
orientation of all base enclosure components.
1.
 Prepare the computer for disassembly (Section 5.5).
2.
 Remove the RTC battery (Section 5.10).
3.
 Remove the keyboard (Section 5.11).
4.
 Remove the switch cover (Section 5.13).
5.
 Remove the display assembly (Section 5.14).
6.
 Remove the top cover (Section 5.15).
7.
 Remove the modem connector board (Section 5.17).
8.
 Remove the PC Card assembly (Section 5.18).
9.
 Position the computer so the front faces forward.
10.
 Use the connector removal tool to disconnect the left battery terminal cable 
, right
battery cable 
, fan cable , LED cable , and speaker cable ! (Figure 5-27)
Figure 5-27.
  Disconnecting Cables from the System Board 
						

							5-30    Removal and Replacement Procedures
11.
 Remove the two screws from the back of the computer that secures the system board
to the base enclosure 


 (Figure 5-28).
12.
 Remove the silver screw from the heat sink .
13.
 Remove the black screws from around the fan , around the USB port , and
around the battery cable in the upper left of the board 
.
14.
 Lift up the rear edge of the system board.
15.
 Remove the system board.
Figure 5-28.
  Removing the System Board
Reverse the above procedure when installing the system board.  Make sure to replace
all components of the base enclosure into their appropriate locations.