HP Envy 4 Manual

							WLAN module
DescriptionSpare part number
Intel® Centrino® Wireless-N 1030 + Bluetooth combo w/ *2 antennas (802.11 b/g/n, Bluetooth 3.0) 670290–005
Atheros 9485GN 802.11b/g/n 1×1 WiFi and 3012 Bluetooth 4.0 Combo Adapter 655795–005
Broadcom 4313GN 802.11b/g/n 1×1 WiFi and 20702 Bluetooth 4.0 Combo Adapter 657325–005
Intel® Centrino® Wireless-N 1030 + Bluetooth combo w/ *2 antennas (802.11 b/g/n, Bluetooth 3.0) 657325–005
CAUTION:To prevent an unresponsive system, replace the wireless module only with a wireless
module authorized for use in the computer by the governmental agency that regulates wireless
devices in your country or region. If you replace the module and then receive a warning message,
remove the module to restore device functionality, and then contact technical support.
Before removing the WLAN module, follow these steps:
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 unplugging the power cord from the AC outlet
and then unplugging the AC adapter from the computer.
4.Remove the display panel (see 
Display panel on page 31).
5.Remove the base enclosure (see 
Base enclosure on page 33).
6.Disconnect the battery cable (see 
Battery on page 35).
Remove the WLAN module:
1.Disconnect the #1 and #2 WLAN antenna cables from the WLAN module (1).
NOTE:The #1 WLAN antenna cable is connected to the WLAN module #1 main terminal. The
#2 WLAN antenna cable is connected to the WLAN module #2 auxiliary terminal.
2.Remove the 1 Phillips PM 2.0×2.5 screw (2) that secures the WLAN module to the
system board. (The WLAN module tilts up.)
Component replacement procedures 43 
						

							3.Remove the WLAN module by pulling the module away from the slot at an angle (3).
NOTE:If the WLAN antennas are not connected to the terminals on the WLAN module, the
protective sleeves must be installed on the antenna connectors.
44 Chapter 4   Removal and replacement procedures 
						

							TouchPad module
DescriptionSpare part number
TouchPad button board (includes cable) 687997–001
TouchPad button board (includes cable) 691640–001
Before removing the TouchPad button board, follow these steps:
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 unplugging the power cord from the AC outlet
and then unplugging the AC adapter from the computer.
4.Remove the display panel (see 
Display panel on page 31).
5.Remove the base enclosure (see 
Base enclosure on page 33).
Remove the TouchPad button board and cable:
1.Turn the top cover upside down, with the back edge toward you.
2.Disconnect the cable (1) that secures the TouchPad cable to the system board.
3.Remove the 4 Phillips PM 2.5×3.0 black screws (2) that secure the TouchPad button board to
the top cover.
4.Remove the 2 Phillips PM 2.5x3.0 silver screws, and then remove the TouchPad bracket (3).
Component replacement procedures 45 
						

							5.Lift up on the rear edge, slide backwards, and then remove the TouchPad button board and
cable (4).
Reverse this procedure to install the TouchPad button board and cable.
Fan
Description Spare part number
Fan (with foil) 691641–001
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 unplugging the power cord from the AC outlet
and then unplugging the AC adapter from the computer.
4.Remove the display panel (see 
Display panel on page 31).
5.Remove the base enclosure (see 
Base enclosure on page 33).
6.Remove the battery cable (see 
Battery on page 35).
Remove the fan:
1.Disconnect the fan cable (1).
2.Remove the 2 Phillips PM screws securing the fan to the unit (2), and then lift the fan upwards
(3).
46 Chapter 4   Removal and replacement procedures 
						

							3.Remove the piece of tape on the underside of the heat sink that secures the fan to the unit (4).
System board
NOTE:The system board spare part kit includes replacement thermal material.
DescriptionSpare part number
For use only with computer models equipped with an Intel 1.7GHz processor, but not WWAN
capability (includes replacement thermal material)686087–001
686087–501
686087–601
689844–001
689844–501
689844–601
For use only with computer models equipped with an Intel 1. 8Hz processor but not WWAN
capability (includes replacement thermal material)686086–001
686086–501
686086–601
693657–001
693657–501
693657–601
Component replacement procedures 47 
						

							DescriptionSpare part number
For use only with computer models equipped with an Intel 1.4GHz processor, but not WWAN
capability (includes replacement thermal material)686088–001
686088–501
686088–601
686090–001
686090–501
686090–601
For use only with computer models equipped with an Intel 1.5Hz processor, but not WWAN
capability (includes replacement thermal material)693655–001
693655–501
693655–601
693656–001
693656–501
693656–601
Before removing the system board, follow these steps:
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 unplugging the power cord from the AC outlet
and then unplugging the AC adapter from the computer.
4.Remove the display panel (see 
Display panel on page 31).
5.Remove the base enclosure (see 
Base enclosure on page 33).
6.Remove the battery (see 
Battery on page 35).
7.Remove the WLAN module (see 
WLAN module on page 43).
8.Remove the hard drive (see 
Hard drive on page 37).
9.Disconnect the display panel cable from the system board (see 
Display panel on page 31).
10.Remove the speaker (see 
Speakers on page 58).
11.Remove the power connector and cable (see 
Power connector cable on page 57).
12.Remove the USB/Audio and cable (see USB/Audio).
When replacing the system board, be sure that the following components are removed from the
defective system board and installed on the replacement system board:
●RTC battery (see 
RTC battery on page 40)
●Memory module (see 
Memory module on page 41)
●Power connector cable (see 
Power connector cable on page 57)
●Fan (see 
Heat sink on page 51)
●Heat sink (see 
Heat sink on page 51)
48 Chapter 4   Removal and replacement procedures 
						

							●WLAN module see (WLAN module on page 43).
●Hard drive (see 
Hard drive on page 37).
●USB/Audio (see USB/Audio)
●Display panel cable (see 
Display panel on page 31).
Remove the system board:
1.Remove the following cables:
●Power connector cable (1)
●Speaker cable (2)
●Subwoofer cable (3)
●USB/Audio board cable (4)
●Keyboard cable (5)
●Keyboard light cable (6)
●TouchPad board cable (7)
●Wireless cable (8)
●Display panel cable (9)
●Power button board cable (10)
2.Remove the 4 Phillips PM 2.5x3 screws (1) until the system board rests at an angle.
Component replacement procedures 49 
						

							3.Remove the system board (2) by sliding it up and to the right at an angle.
Reverse this procedure to install the system board.
50 Chapter 4   Removal and replacement procedures 
						

							Heat sink
DescriptionSpare part number
Fan — Heat sink686578–001
Fan — Heat sink686579–001
NOTE:To properly ventilate the computer, allow at least 7.6 cm (3 in) of 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, follow these steps:
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 unplugging the power cord from the AC outlet
and then unplugging the AC adapter from the computer.
4.Remove the display panel (see 
Display panel on page 31).
5.Remove the base enclosure (see 
Base enclosure on page 33).
6.Disconnect the battery cable (see 
Battery on page 35),
Remove the fan:
1.Turn the computer, with the front toward you.
2.Disconnect the fan cable (1) from the system board.
3.Remove the 4 Phillips PM 2.0×3.0 screws securing the heat sink (2), and the 2 Phillips PM
2.0×3.0 screws securing the fan (3).
Component replacement procedures 51 
						

							4.Remove the heat sink (4).
Reverse this procedure to install the fan and the heat sink..
RJ-45 module cover
Description Spare part number
RJ-45 module cover 686582-001
Before removing the RJ-45 module cover:
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 unplugging the power cord from the AC outlet
and then unplugging the AC adapter from the computer.
4.Remove the display panel (see 
Display panel on page 31).
5.Remove the base enclosure (see 
Base enclosure on page 33).
6.Disconnect the battery cable (see 
Battery on page 35).
Remove the RJ-45 module cover:
1.Remove the 2 Phillips PM screws securing the RJ-45 module cover (1).
52 Chapter 4   Removal and replacement procedures