HP Pavilion Dv4 2100 Entertainment Notebook Pc Series Manual

							Removal and replacement procedures
Maintenance and Service Guide4–49
Remove the power connector:
1. Turn the computer right-side up.
2. Position the computer with the right side toward you.
3. Remove the power connector 1 from the clip built into the base enclosure. The power connector is secured by 
double-sided tape.
4. Disconnect the power connector cable 2 from the base enclosure.
Reverse this procedure to install the power connector and cable.  
						

							4–50Maintenance and Service Guide
Removal and replacement procedures
System board
Before removing the system board: 
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, 
and then shut it down through the operating system. 
2. Disconnect all external devices connected to the computer. 
3. Disconnect the power from the computer by first disconnecting the power cord from the AC outlet and then 
disconnecting the AC adapter from the computer. 
4. Remove the battery (see “Battery” on page 4-7). 
5. Remove the following components: 
a. Hard Drive (see “Hard Drive” on page 4-8)
b. Memory module (see “Memory module” on page 4-10)
c. Mini Card compartment cover (see “RTC battery” on page 4-12)
d. WLAN module (see “WLAN module” on page 4-15)
e. Optical drive (see “Optical drive” on page 4-19)
f. Keyboard (see “Keyboard” on page 4-20)
g. Keyboard cover (see “Keyboard cover” on page 4-23) 
h. Speaker assembly (see “Speaker assembly” on page 4-26)
i. Display assembly (see “Display assembly” on page 4-27)
j. Top cover (see “Top cover” on page 4-34)
DescriptionSpare part number
System board (includes replacement thermal material)
UMA graphics subsystems590350-001
Discrete graphics subsystems590349-001 
						

							Removal and replacement procedures
Maintenance and Service Guide4–51
When replacing the system board, be sure that the following additional components are removed from the defective 
system board and installed on the replacement system board: 
■Heat sink assembly (see “Heat sink assembly” on page 4-55)
■Processor (see “Processor” on page 4-59)
Remove the system board:
1. Turn the computer display-side up, with the right side toward you.
2. Disconnect the following cables from the system board:
1 Modem cable
2 Audio board cable
3 Fan cable
3. Disconnect the power connector cable. 
						

							4–52Maintenance and Service Guide
Removal and replacement procedures
4. Remove the two Phillips PM1.5×9.0 screws 1 and the Phillips PM2.5×3.0 screw 2 that secure the system 
board to the computer.
5. Use the optical drive connector 1 to lift the right side of the system board 2 until it rests at an angle. 
6. Release the system board 3 by sliding it to the right at an angle until the connectors on the left side of the 
system board disengage from the base enclosure, and then remove the system board. 
Reverse this procedure to install the system board.  
						

							Removal and replacement procedures
Maintenance and Service Guide4–53
RJ-11 connector (select models only)
Before removing the RJ-11 connector: 
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, 
and then shut it down through the operating system. 
2. Disconnect all external devices connected to the computer. 
3. Disconnect the power from the computer by first disconnecting the power cord from the AC outlet and then 
disconnecting the AC adapter from the computer. 
4. Remove the battery (see “Battery” on page 4-7). 
5. Remove the following components: 
a. Hard Drive (see “Hard Drive” on page 4-8)
b. Memory module (see “Memory module” on page 4-10)
c. Mini Card compartment cover (see “RTC battery” on page 4-12)
d. WLAN module (see “WLAN module” on page 4-15)
e. Optical drive (see “Optical drive” on page 4-19)
f. Keyboard (see “Keyboard” on page 4-20)
g. Keyboard cover (see “Keyboard cover” on page 4-23) 
h. Speaker assembly (see “Speaker assembly” on page 4-26)
i. Display assembly (see “Display assembly” on page 4-27)
j. Top cover (see “Top cover” on page 4-34)
k. Modem module (see “Modem module (select models only).” on page 4-40)
l. System board (see “System board” on page 4-50)
DescriptionSpare part number
Modem module cable (includes RJ-11 connector)494981-001 
						

							4–54Maintenance and Service Guide
Removal and replacement procedures
Remove the RJ-11 connector: 
1. Remove the RJ-11 connector 1 from the clip built into the base enclosure.
2. Remove the RJ-11 connector cable 2 from the routing channel built into the base enclosure.
Reverse this procedure to install the RJ-11 connector. 
						

							Removal and replacement procedures
Maintenance and Service Guide4–55
Heat sink assembly
Before removing the heat sink assembly:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, 
and then shut it down through the operating system. 
2. Disconnect all external devices connected to the computer. 
3. Disconnect the power from the computer by first disconnecting the power cord from the AC outlet and then 
disconnecting the AC adapter from the computer. 
4. Remove the battery (see “Battery” on page 4-7). 
5. Remove the following components: 
a. Hard Drive (see “Hard Drive” on page 4-8)
b. Memory module (see “Memory module” on page 4-10)
c. Mini Card compartment cover (see “RTC battery” on page 4-12)
d. WLAN module (see “WLAN module” on page 4-15)
e. Optical drive (see “Optical drive” on page 4-19)
f. Keyboard (see “Keyboard” on page 4-20)
g. Keyboard cover (see “Keyboard cover” on page 4-23) 
h. Speaker assembly (see “Speaker assembly” on page 4-26)
i. Display assembly (see “Display assembly” on page 4-27)
j. Top cover (see “Top cover” on page 4-34)
k. System board (see “System board” on page 4-50)
DescriptionSpare part number
System board (includes replacement thermal material)
UMA graphics subsystems591957-001
Discrete graphics subsystems591956-001 
						

							4–56Maintenance and Service Guide
Removal and replacement procedures
Remove the heat sink assembly:
1. Turn the system board upside down with the front toward you.
2. Loosen the four captive Phillips PM2.0×10.0 screws 1 that secure the heat sink assembly to the system board.
3. Remove the Phillips PM2.5×3.0 screw 2 that secures the heat sink assembly to the system board.
4. Remove the heat sink assembly 3.
✎Due to the adhesive quality of the thermal material located between the heat sink assembly and system board 
components, it might be necessary to move the heat sink assembly from side to side to detach the assembly.
✎The thermal material must be thoroughly cleaned from the surface of the heat sink assembly and the system board 
each time the heat sink assembly is removed. Thermal material is applied to the heat sink to correspond with 
components on the system board as follows: the processor 
1, the Northbridge chip 2, and the capacitors 3. 
Replacement thermal material is included with all system board, fan/heat sink assembly, and processor spare parts.
Reverse this procedure to install the heat sink assembly. 
						

							Removal and replacement procedures
Maintenance and Service Guide4–57
Fan
✎To properly ventilate the computer, allow at least a 7.6 cm (3 in) clearance on the left side of the computer. The 
computer uses an electric fan for ventilation. The fan is controlled by a temperature sensor and is designed to turn 
on automatically when high temperature conditions exist. These conditions are affected by high external 
temperatures, system power consumption, power management/battery conservation configurations, battery fast 
charging, and software requirements. Exhaust air is displaced through the ventilation grill located on the left side 
of the computer. 
Before removing the fan:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, 
and then shut it down through the operating system. 
2. Disconnect all external devices connected to the computer. 
3. Disconnect the power from the computer by first disconnecting the power cord from the AC outlet and then 
disconnecting the AC adapter from the computer. 
4. Remove the battery (see “Battery” on page 4-7). 
5. Remove the following components: 
a. Hard Drive (see “Hard Drive” on page 4-8)
b. Memory module (see “Memory module” on page 4-10)
c. WLAN module (see “WLAN module” on page 4-15)
d. Mini Card compartment cover (see “RTC battery” on page 4-12)
e. Optical drive (see “Optical drive” on page 4-19)
f. Keyboard (see “Keyboard” on page 4-20)
g. Keyboard cover (see “Keyboard cover” on page 4-23) 
h. Speaker assembly (see “Speaker assembly” on page 4-26)
i. Display assembly (see “Display assembly” on page 4-27)
j. Top cover (see “Top cover” on page 4-34)
k. System board (see “System board” on page 4-50)
DescriptionSpare part number
Fan (includes replacement thermal material)486844-001 
						

							4–58Maintenance and Service Guide
Removal and replacement procedures
Remove the fan:
1. Position the base enclosure with the front toward you.
2. Remove the two black Phillips PM2.5×5.0 screws 1 that secure the fan to the computer.
3. Lift the fan from the base enclosure 2.
Reverse this procedure to install the fan.