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...

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...

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...

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...

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...

●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)...

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...

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...