Service Teardown: HP 340, 348 G7 Notebook PC
How to replace the Base Enclosure.
Removal -
Remove the two rubber feet from the base enclosure.
Remove the two 4.5 mm P1 Phillips-head screws
that secure the base enclosure to the top cover.
Remove the four 6 mm P1 Phillips-head screws
that secure the base enclosure to the top cover.
Carefully separate the edges of the base enclosure from the top cover.
Remove the base enclosure.
Reverse this procedure to install the base enclosure.
How to replace the Battery.
WARNING: To avoid personal injury and damage to the product,
use extreme care not to puncture, twist, or crack the battery.
An internal puncture or rupture to the battery
has the potential to cause a short which may result in a thermal event.
Before you begin: Remove the base enclosure.
Removal -
Remove the four 4 mm P1 Phillips-head screws
that secure the battery to the top cover.
Lift the battery off the alignment pins on the top cover and remove.
Reverse this procedure to install the battery.
How to replace the Hard Disk Drive Assembly
Before you begin: Remove the base enclosure and battery.
Removal -
Using minimal force, lift the locking bar up on the hard disk drive ZIF connector
and disconnect the hard disk drive ribbon cable from the motherboard.
Lift the hard disk drive assembly out of the cradle on the top cover and remove.
NOTE: Before installing a new hard disk drive,
remove bracket and adapter cable from the old hard disk drive
and install them onto the new hard disk drive.
Reverse this procedure to install the hard disk drive assembly.
How to replace the Memory Module(s)
Before you begin: Remove the base enclosure and battery.
Removal -
Push both arms outward simultaneously
to release the memory module to the spring tension position.
Grasp the memory module by the edges and pull gently to remove it.
Reverse this procedure to install the memory module.
IMPORTANT: When installing a memory module,
be sure to align the notch in the memory module
with the key in the memory module slot in the motherboard.
How to replace the M.2 Solid State Drive
Before you begin: Remove the base enclosure and battery.
Removal -
Remove the 4 mm P1 Phillips-head screw
that secures the solid state drive to the motherboard.
Grasp the solid state drive by the edges and pull gently to remove it from its slot.
Reverse this procedure to install the solid state drive.
IMPORTANT: When installing the solid state drive,
be sure to align the notch in the solid state drive
with the key in the solid state drive slot in the motherboard.
How to replace the WLAN Module.
Before you begin: Remove the base enclosure and battery.
Removal -
CAUTION! Use care when disconnecting the WLAN antenna cables
from the WLAN module.
A damaged cable or connector can degrade notebook performance.
Carefully disconnect the WLAN antenna cables from the WLAN module
by grasping the connectors with a small pair of needle nose pliers or tweezers.
Remove the 4 mm P1 Phillips-head screw
that secures the WLAN module to the top cover.
Grasp the WLAN module by the edges and pull gently to remove it.
Reverse this procedure to install the WLAN module.
IMPORTANT: When installing the WLAN module,
be sure to align the notch in the WLAN module
with the key in the WLAN module slot in the motherboard.
How to replace the Touchpad Click Board.
Before you begin: Remove the base enclosure and battery.
Removal –
Using minimal force, lift the locking bars up on the touchpad click board ZIF connectors
and disconnect the two touchpad click board ribbon cables from the touchpad click board.
Using minimal force, lift the locking bar up on the touchpad click board ZIF connector
and disconnect the touchpad click board ribbon cable from the touchpad board.
Peel back the retention tape that secures the touchpad click board to the touchpad board.
Remove the 2.5 mm P0 Phillips broad-head screws
that secure the touchpad click board to the top cover.
Lift the touchpad click board off the alignment pins
on the top cover and remove.
Reverse this procedure to install the touchpad click board.
How to replace the Fingerprint Reader Board.
Before you begin: Remove the base enclosure and battery.
Removal –
Remove the two 2.5 mm P1 Phillips broad-head screw
that secures the fingerprint reader board bracket to the top cover.
Lift the fingerprint reader board bracket
off the alignment pins on the top cover and remove.
Using minimal force,
lift the locking bar up on the fingerprint reader board ZIF connector
and disconnect the fingerprint reader board ribbon cable
rom the fingerprint reader board.
Lift the fingerprint reader board out of the cradle in the top cover and remove.
Reverse this procedure to install the fingerprint reader board.
How to replace the Fan.
Before you begin: Remove the base enclosure and battery.
Removal –
Disconnect the fan cable from the connector on the motherboard.
Remove the two 4 mm P1 Phillips-head screws
that secures the fan to the top cover and motherboard.
Lift the fan off the top cover,
slide it out from under the heatsink, and remove.
Reverse this procedure to install the fan.
How to replace the Card Reader Board.
Before you begin: Remove the base enclosure, battery, and WLAN module.
Removal -
IMPORTANT: Make careful note of the routing of the WLAN antenna cables
for later replacement.
Partially remove the WLAN antenna cables
from the routing channel between the card reader board and fan.
Using minimal force, lift the locking bar up on the card reader board ZIF connector
and disconnect the card reader board ribbon cable from the motherboard.
Remove the three 4 mm P1 Phillips-head screws
that secure the card reader board to the top cover.
Lift the card reader board off the alignment pins on the top cover and remove.
Reverse this procedure to install the card reader board.
How to replace the Speakers.
Before you begin: Remove the base enclosure and battery.
Removal -
IMPORTANT: Make careful note
of the routing of the speaker cable for later replacement.
Disconnect the speaker cable from the connector on the motherboard.
Remove the retention tape that secures the speaker cable to the motherboard.
Slide the two speakers out of the cutouts in the motherboard and remove.
Remove the speakers.
Reverse this procedure to install the speakers.
How to replace the Heatsink.
Before you begin: Remove the base enclosure, battery, and fan.
Removal –
Note: The heatsink has either four or six screws securing it to the mother board.
The heatsink with six screws is shown in this video.
Note: The heatsink has numbers adjacent to the following six screws.
Loosen the six 4mm P1 Phillips-head screws
that secure the heatsink over the processor components in numerical order.
Note: Due to the adhesive quality of the thermal grease
located between the heatsink and processor components,
it may be necessary to move the heatsink from side to side
to detach it from the mother board.
Carefully lift the heatsink off the mother board and remove.
Note: Before replacing the heatsink, the thermal grease should be replaced.
The thermal grease should be replaced every time the heatsink is removed.
Reverse this procedure to install the heatsink.
How to replace the DC-in Cable
Before you begin: Remove the base enclosure, battery, WLAN module,
card reader board, speakers, and display panel assembly.
Removal -
Disconnect the DC-in cable from the connector on the motherboard
and remove it from the routing channel on the top cover.
Release the DC-in connector from the retention tabs on the top cover and remove.
Reverse this procedure to install the DC-in cable.
How to replace the Motherboard.
Before you begin: Remove the base enclosure, battery, WLAN module,
hard disk drive assembly, fan, card reader board, speakers, and display panel assembly.
Removal -
Disconnect the DC-in cable from the connector on the motherboard.
Using minimal force, lift the locking bar up on the keyboard backlight ZIF connector
and disconnect the keyboard backlight ribbon cable from the motherboard.
Using minimal force, lift the locking bar up on the keyboard ZIF connector
and disconnect the keyboard ribbon cable from the motherboard.
Using minimal force, lift the locking bar up on the touchpad click board ZIF connector
and disconnect the touchpad click board ribbon cable from the motherboard.
Using minimal force, lift the locking bar up on the fingerprint reader board ZIF connector
and disconnect the fingerprint reader board ribbon cable from the motherboard.
Remove the plastic battery bracket from the motherboard.
Remove the three 2 mm P1 Phillips-head screws
that secure the motherboard to the top cover.
Remove the 3.5 mm P1 Phillips-head screw
that secures the motherboard to the top cover.
Carefully lift the motherboard off the alignment pins
and slide it out from under the tabs on the rear edge of the top cover.
Remove the motherboard.
NOTE: Before installing a new motherboard, remove the M.2 solid state drive,
memory modules, heatsink, and card reader board ribbon cable
from the old motherboard and install them onto the new motherboard.
Reverse this procedure to install the motherboard.
How to replace the Display Panel Assembly or Top Cover.
Before you begin: Remove the base enclosure, battery, WLAN module,
card reader board, and speakers.
Removal -
Using minimal force, lift the locking bar up on the display panel ZIF connector
and disconnect the display panel cable from the motherboard.
Grasp the top cover near the display panel hinges
and open it approximately 90 degrees.
While supporting the top cover, remove the two 6 mm P1 Phillips-head screws
that secure the left display panel hinge to the top cover.
Remove the two 6 mm and one 4 mm P1 Phillips-head screws
that secure the right display panel hinge to the top cover.
Slide the top cover off the display panel hinges and remove.
NOTE: Before installing a new top cover,
remove all components from the old top cover and install them onto the new top cover.
Reverse this procedure to install the display panel assembly or top cover.
How to replace the Hinge Cover.
Before you begin: Remove the base enclosure, battery, WLAN module,
card reader board, speakers, and display panel assembly.
Removal -
Carefully squeeze the hinge cover
to release the retention clips that secure it to the display panel assembly.
Slide the hinge cover off the display panel hinges and remove.
Reverse this procedure to install the hinge cover.
How to replace the Display Bezel.
Before you begin: Remove the base enclosure, battery, WLAN module,
card reader board, speakers, display panel assembly, and hinge cover.
Removal -
Carefully separate the inside edges of the display bezel
from the top, sides, and bottom to disengage it from the display enclosure.
IMPORTANT: The edges of the display bezel are held in place with adhesive.
Take care when removing them from the display enclosure.
It may be necessary to use a non-metallic flat-bladed tool to aid in the removal.
Lift the display bezel off the display enclosure and remove.
Reverse this procedure to install the display bezel.
How to replace the Webcam.
Before you begin: Remove the base enclosure, battery, WLAN module,
card reader board, speakers, display panel assembly, hinge cover., and display bezel.
Removal -
Disconnect the webcam cable from the webcam board.
Using a flat, non-conductive tool,
carefully remove the webcam board from the adhesive that secures it to the display enclosure
and lift the webcam board off its alignment pins on the display enclosure.
Reverse this procedure to install the webcam.
How to replace the LCD Panel.
Before you begin: Remove the base enclosure, battery, WLAN module,
card reader board, speakers, display panel assembly, hinge cover., and display bezel.
Removal -
IMPORTANT: The LCD panel is held in place by two strips of stretch-release tape.
Each tape strip has a plastic pull-tab attached to one end.
One at a time, grasp the pull-tab of each strip of tape
and carefully wrap it around the end of a cylindrical tool such as a screw drive.
Slowly twist the tool to release the tape.
Continue twisting until the entire strip has been removed.
IMPORTANT: If the stretch-release tape strips are pulled too quickly
or at an extreme angle, they will break before releasing the LCD panel.
NOTE: The removed stretch-release tape is not reusable.
Lift the LCD panel off the display enclosure
and place it in front of the display enclosure.
IMPORTANT: Take care not to scratch the LCD panel screen.
Peel back the retention tape
and disconnect the LCD panel cable from the connector on the LCD panel.
Remove the LCD panel.
IMPORTANT: Please refer to the maintenance and service guide
for instructions on replacing the LCD panel.
The stretch-release tape strips that secure the LCD panel
to the display enclosure must to be placed in a specific orientation.
How to replace the Display Panel Hinges.
Before you begin: Remove the base enclosure, battery, WLAN module,
display panel assembly, hinge cover, display bezel, and LCD panel.
Removal -
IMPORTANT: Make careful note of the routing of the wireless antenna
and display panel cables for later replacement.
Remove the three 2.5 mm P1 Phillips broad-head screws
that secure the left display panel hinge to the display enclosure.
Release the left display panel hinge
from the retention tabs on the display enclosure and remove.
The right display panel hinge is removed in the same manner.
Reverse this procedure to install the display panel hinges.
How to replace the Touchpad Ribbon Cable.
Before you begin: Remove the base enclosure and battery.
Removal –
Using minimal force, lift the locking bar up on the touchpad click board ZIF connector
and disconnect the touchpad board ribbon cable from the touchpad click board.
Using minimal force, lift the locking bar up on the touchpad board ZIF connector
and disconnect the touchpad board ribbon cable from the motherboard.
Remove the touchpad ribbon cable
from the adhesive that secures it to the top cover and remove.
Reverse this procedure to install the touchpad ribbon cable