compaq notebook evo n150 series User Manual

							Removal and Replacement Procedures
Maintenance and Service Guide5–25
2. Disconnect the fan cable
from the system board
(Figure 5-17).
3. Remove the modem cable from the clip in the heat sink
.
4. Remove the four black M2 × 4.0 screws
and the pewter
M2.5 × 7.0 screw
that secure the heat sink to the base
enclosure.
5. Remove the heat sink.
Figure 5-17. Removing the Heat Sink

The fan and heat sink are spared as one assembly. Do not remove
the fan from the heat sink.
Reverse the above procedure to install the heat sink. 
						

							5–26Maintenance and Service Guide
Removal and Replacement Procedures
5.15 Infrared Board
1. Prepare the computer for disassembly (Section 5.3) and
remove the following components:
a. Hinge covers (Section 5.5)
b. Keyboard (Section 5.6)
c. Display (Section 5.7)
d. EMI shield (Section 5.8)
e. Top cover (Section 5.9)
Infrared Board
Spare Part Number Information
Infrared board 239045-001 
						

							Removal and Replacement Procedures
Maintenance and Service Guide5–27
2. Disconnect the infrared board cable
from the system board
(Figure 5-18).
3. Remove the infrared board cable from the metal clip

through which it is routed.
4. Remove the black M2 × 4.0 screw
that secures the infrared
board to the base enclosure.
5. Lift the infrared board
out of the base enclosure.
Figure 5-18. Removing the Infrared Board
Reverse the above procedure to install the infrared board. 
						

							5–28Maintenance and Service Guide
Removal and Replacement Procedures
5.16 System Board

There are 11 screws and screwlocks in five different sizes that
must be removed and replaced when replacing the system board.
Make special note of each screw size and location when removing
and replacing screws.
1. Prepare the computer for disassembly (Section 5.3) and
remove the following components:
a. Hinge covers (Section 5.5)
b. Keyboard (Section 5.6)
c. Display (Section 5.7)
d. EMI shield (Section 5.8)
e. Top cover (Section 5.9)
f. Infrared board (Section 5.15)
2. Turn the base enclosure top side up with the rear panel
facing you.
System Board
Spare Part Number Information
System boards (includes 64 MB SDRAM)
800 MHz Intel Pentium III
700 MHz Intel Celeron239051-001
239050-001 
						

							Removal and Replacement Procedures
Maintenance and Service Guide5–29
3. Remove the six 5.0-mm screwlocks from the rear panel of the
computer (Figure 5-19).
Figure 5-19. Removing the System Board Screwlocks 
						

							5–30Maintenance and Service Guide
Removal and Replacement Procedures
4. Position the base enclosure so the front faces you.
5. Remove the following screws, as illustrated in Figure 5-20:
two black M2 × 14.5 screws
that secure the PC Card
assembly to the base enclosure
black M2.5 × 4.5 screwnear the USB connector that
secures the system board to the base enclosure
black M2.5 × 4.0 screwthat secures the modem
connector/cable to the base enclosure
blackM2×4.0screwnear the display connector that
secures the system board to the base enclosure
Figure 5-20. Removing the System Board Screws 
						

							Removal and Replacement Procedures
Maintenance and Service Guide5–31
6. Lift up the front edge of the system board
until the board
and the battery connector
are clear of the base enclosure
(Figure 5-21).
ÄCAUTION:When removing the system board, make sure the
battery connector
is carefully routed out of the openingin the
base enclosure in which it rests. Failure to follow this caution can
result in damage to the battery connector.
Figure 5-21.Lifting the System Board 
						

							5–32Maintenance and Service Guide
Removal and Replacement Procedures
7. Slide the system board out of the base enclosure at an angle
(Figure 5-22).
Figure 5-22. Removing the System Board
Reverse the above procedure to install the system board. 
						

							Removal and Replacement Procedures
Maintenance and Service Guide5–33
5.17 PC Card Assembly
1. Prepare the computer for disassembly (Section 5.3)) and
remove the following components:
a. Hinge covers (Section 5.5)
b. Keyboard (Section 5.6)
c. Display (Section 5.7)
d. EMI shield (Section 5.8)
e. Top cover (Section 5.9)
f. Infrared board (Section 5.15)
g. System board (Section 5.16)
2. Turn the system board bottom side up with the PC Card slot
opening facing you.
PC Card Assembly
Spare Part Number Information
PC Card assembly 239040-001 
						

							5–34Maintenance and Service Guide
Removal and Replacement Procedures
3. Peel back the shielding tape that covers the right PC Card
screw

(Figure 5-23).
4. Remove the two silver M2 × 5.0 screws
that secure the
PC Card assembly to the system board.
5. Turn the system board top side up with the PC Card slot
opening facing you.
6. Lift up the back edge of the PC Card assembly to disconnect
it from the system board
.
7. Remove the PC Card assembly.
Figure 5-23. Removing the PC Card Assembly
Reverse the above procedure to install the PC Card assembly.