Service Teardown: HP ProDesk 400 G6 DM
How to Replace the Access Panel
Removal -
NOTE: The front bezel comes attached to the access panel
and is not separately removable/replaceable.
Loosen the T15 captive thumb screw
on the rear of the chassis.
Firmly slide the panel toward the front of the unit
to disengage it from the chassis.
Lift the panel off the chassis.
Replacement -
Align the tabs with the slots in the chassis
and lower the access panel into position on the chassis.
Slide the panel toward the rear of the unit
until the rear edge of the panel is flush against the rear of the chassis.
Tighten the T15 captive thumb screw on the rear of the chassis.
How to Replace the 2.5in Storage Drive
Before you begin: Remove the access panel.
Removal -
Swing the storage drive cage lever up
to partially disconnect the storage drive from the adapter cable.
Slide the storage drive away from the connector and lift it up and out of the cage.
Replacement -
IMPORTANT: If you are replacing the storage drive,
the mounting screws will need to be removed from the old storage drive
and attached to the new storage drive.
Align the mounting screws on the storage drive
with the slots in the storage drive cage
and lower the storage drive into position.
Press the storage drive cage lever down
while sliding the storage drive toward the connector
until the storage drive is fully seated in the connector and the cage lever is closed.
How to Replace the Storage Drive Cage
Before you begin: Remove the access panel
and 2.5in storage drive.
Removal - Using minimal force, lift the locking bar up
on the storage drive cable ZIF connector
and disconnect the storage drive ribbon cable from the motherboard.
Disconnect the storage drive fan cable from the connector on the motherboard.
Remove the two 13 mm T15 Torx-head screws
that secure the storage drive cage to the mother board.
Slide the storage drive cage toward the rear of the chassis
to disengage it from the slots in the chassis.
Lift the storage drive cage up and out of the chassis.
Replacement -
Align the tabs on the storage drive cage with the slots in the chassis
and lower the storage drive into position.
Slide the storage drive cage towards the front of the chassis
to secure it into the slots in the chassis.
Replace the two 13 mm T15 Torx-head screws
that secure the storage drive cage to the motherboard.
Connect the storage drive fan cable
into the connector on the motherboard.
Insert the storage drive cable into the storage drive ZIF connector on the motherboard
and press the locking bar down to lock the cable into place.
How to Replace the Storage Drive Cable
Before you begin: Remove the access panel
2.5in storage drive and storage drive cage.
Removal -
Remove the two 9 mm T15 Torx-head screws
that secure the storage drive cable to the storage drive cage.
Slide the allignment pins on the storage drive cable
out of the storage drive cage
and guide the ribbon cable out of the cutout.
Replacement -
Guide the ribbon cable into the cutout
and slide the alignment pins on the storage drive cable
into the holes in the storage drive cage.
Replace the two 9 mm T15 Torx-head screws
that secure the storage drive cable to the storage drive cage
How to Replace the Memory Module
Before you begin: Remove the access panel.
Removal -
Swing up the system fan.
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.
Replacement -
Align the notch in the memory module
with the key in the memory module slot on the mother board.
At an angle, gently insert the memory module into its slot on the mother board.
Press the memory module down to latch the arms.
Swing down the system fan.
How to Replace the System Fan
Before you begin: Remove the access panel.
Removal -
Make careful note of the routing of the fan cable for later replacement.
Remove the system fan cable from the routing channel on the heat sink.
Swing up the system fan.
Disconnect the system fan cable from the connector on the mother board.
Slide the system fan posts out of the cut outs in the chassis and heat sink and remove.
Replacement –
Slide the system fan posts into the slots
in the chassis and heat sink.
Connect the system fan cable
nto the connector on the mother board.
Swing down the system fan.
Route the fan connector through the routing channel on the heat sink.
How to Replace the Thermal Sensor
Before you begin: Remove the access panel.
Removal -
Disconnect the thermal sensor
from the connector on the mother board and remove.
Replacement –
Connect the thermal sensor
into the connector on the mother board.
How to Replace the Sepaker
Before you begin: Remove the access panel.
Removal -
Disconnect the thermal speaker cable
from the connector on the mother board.
Slide the rubber posts on the speaker
out of the cutouts in the chassis and remove.
Replacement –
Slide the rubber posts on the speaker into the slots in the chassis
Connect the speaker cable
into the connector on the mother board
How to Replace the Upper Option Board
Before you begin: Remove the access panel.
Removal -
Disconnect the option board cable
from the connector on the option board.
Remove the two 4 mm P1 Phillip-head screws
that secure the option board to the chassis.
Lift the option board straight up
and out of the chassis and remove.
Replacement –
Toe the tab on the option board,
into the slot in the chassis
and place the option board into position.
Replace the two 4 mm P1 Phillip-head screws
that secure the option board to the chassis.
Connect the option board cable
into the connector on the option board.
How to Repalce the Wireless LAN Module
Before you begin: Remove the access panel,
2.5in storage drive, and storage drive cage.
Removal -
CAUTION!
Use care when disconnecting the wireless LAN antenna cables
from the wireless LAN module.
A damaged cable or connector can degrade performance.
Carefully disconnect the wireless LAN antenna cables from the wireless LAN 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 wireless LAN module to the mother board
and allow it to release to the spring tension position.
Grasp the wireless LAN module by the edges
and pull gently to remove it from the slot on the mother board.
Replacement -
Align the notch in the wireless LAN module
with the key in the wireless LAN module slot on the mother board.
At an angle, gently insert the wireless LAN module
into the slot on the mother board
Replace the 4 mm P1 Phillips-head screw
that secures the wireless LAN module to the mother board.
Reconnect the wireless LAN antenna cables to the wireless LAN module.
CAUTION!
Use care when connecting the wirelss LAN antenna cables to the wireless LAN module.
A damage cable or connector
can degrade performance.
How to Replace the M.2 Solid State Drive
Before you begin: Remove the access panel,
2.5in storage drive, and storage drive cage.
Removal -
Remove the 4 mm P1 Phillips-head screw
that secures the solid state drive to the mother board
and allow it to release to the spring tension position.
Grasp the solid state drive by the edges
and pull gently to remove it from the slot on the mother board.
Replacement -
Align the notch in the solid state drive
with the key in the solid state drive slot on the mother board.
At an angle, gently insert the solid state drive
into its slot on the mother board.
Replace the 4 mm P1 Phillips-head screw
that secures the solid state drive to the mother board.
How to Replace the Lower Option Board
Before you begin: Remove the access panel,
2.5in storage drive, storage drive cage, and upper option board.
Removal -
Remove the two 4 mm P1 Phillips-head screws
that secure the option board to the mother board.
Lift the edge of the option board to disconnect it from the mother board
and slide it out of the cut out in the chassis.
Replacement -
Slide the option board into the cut out in the chassis
and align the screw holes in the option board with the stand offs on the mother board.
Press the option board into the connector on the mother board.
Replace the two 4 mm P1 Phillips-head screws
that secure the option board to the mother board.
How to Replace the CMOS Battery
Before you begin: Remove the access panel,
2.5in storage drive, and storage drive cage.
Removal –
Carefully release the CMOS battery
from the socket retention clips that secure it
on the mother board and remove.
Replacement -
Carefully secure the CMOS battery
under the socket retention clips on the mother board.
How to Restore CMOS to Factory Settings
Before you begin: Remove the access panel,
2.5in storage drive, and storage drive cage.
Removal –
Carefully release the CMOS battery
from the socket retention clips
that secure it on the mother board and remove.
Wait thirty seconds.
Carefully secure the CMOS battery
under the socket retention clips on the mother board
CMOS factory settings are now reset.
IMPORTANT:
You will now need to enter system BIOS
and reset the clock in BIOS after this procedure.
How to Replace the Heatsink
Before you begin: Remove the access panel,
2.5in storage drive, storage drive cage, and fan.
Removal –
Note:
The heat sink has numbers adjacent to the following three screws.
Loosen the three captive T15 Torx-head screws
that secure the heat sink over the processor in numerical order.
Note: Due to the adhesive quality of the thermal grease and thermal pads
located between the heat sink and processor components
it may be necessary to move the heat sink
from side to side to detach it from the mother board.
Lift the heat sink off of the processor
and slide it out from under the chassis edge.
Replacement –
Using an alcohol swab,
carefully remove the thermal grease from the heatsink and processor.
Apply new thermal grease to the processor.
Inspect the thermal pads.
If one is torn or otherwise damaged,
it needs to be replaced.
Toe the heat sink under the chassis edge,
align the screw holes on the heat sink with the stand offs on the mother board
and place the heat sink into position.
Tighten the three T15 Torx-head screws
that secure the heat sink over the processor in numerical order.
How to Replace the CPU
Before you begin: Remove the access panel,
2.5in storage drive, storage drive cage, fan, and heat sink.
Removal –
Press down to release the CPU load lever
from its retention tab and pull it back.
Lift the load plate off the socket.
IMPORTANT:
Identify the pin 1 triangle on the socket and CPU
prior to removing the CPU.
IMPORTANT:
When handling the CPU, do not touch the CPU contacts.
Carefully lift the CPU straight up and out of the socket.
Replacement –
Align the pin 1 triangle on the CPU
with the pin 1 triangle on the socket.
Carefully lower the CPU into position in the socket.
Swing the load plate down.
Lock the load lever under its retaining tab to secure the CPU in place.
How to Replace the Motherboard
Before you begin: Remove the access panel,
2.5in storage drive, storage drive cage. wireless LAN module, speaker,
upper option board, m.2 solid state drive, lower option board,
fan, heat sink, and CPU.
Removal -
IMPORTANT: If a storage drive cage is installed
two 9 mm T15 Torx-head screws secure the mother board in place
If no storage drive is present
then three 13 mm and one 9 mm T15 Torx-head screws
secure the mother board in place.
This video demonstrates the second configuration.
Remove the three 13 mm and one 9 mm T15 Torx-head screws
that secure the mother board to the chassis.
Lift the front edge of the mother board
and guide the external connectors on the mother board
out of the cut outs in the chassis.
Remove the mother board.
Note: Before installing a new mother board,
remove the following from the old mother board
and install onto the new mother board:
Memory board(s)
CMOS battery
Thermal Pad
Replacement –
At an angle,
toe the external connectors on the rear edge of the mother board
into the cut outs in the chassis and lower it into position.
Replace the one 9 mm and three 13 mm T15 Torx-head screws
that secure the mother board to the chassis.
How to Replace the Wireless Antennas
Before you begin: Remove the access panel,
2.5in storage drive, storage drive cage. wireless LAN module, speaker,
upper option board, m.2 solid state drive, lower option board,
fan, heat sink, CPU, and mother board.
Removal –
IMPORTANT: Make careful note of the routing of the wireless antenna cables
for later replacement.
Remove the wireless antenna cables
from the routing clips on the chassis.
Remove the 4 mm P1 Phillips-head screw
that secures the number “2” wireless antenna transceiver to the chassis.
Slide the number “2” wireless antenna transceiver
to the right to release the tabs from the cut outs in the chassis.
Guide the number “2” wireless antenna cable
out of the cut out in the chassis and remove.
Remove the 4 mm P1 Phillips-head screw
that secures the number “1” wireless antenna transceiver to the chassis.
Slide the number “1” wireless antenna transceiver to the right
to release the tabs from the cut outs in the chassis.
Guide the number “1” wireless antenna cable
out of the cut out in the chassis and remove.
Replacement –
Guide the number “1” wireless antenna cable
into the cut out in the chassis
and use the retention clips on the wireless antenna transceiver
to secure it to the chassis.
Replace the 4 mm P1 Phillips-head screw
that secures the number “1” wireless antenna transceiver to the chassis.
Guide the number “2” wireless antenna cable
into the cut out in the chassis and use the retention clips on the wireless antenna transceiver
to secure it to the chassis.
Replace the 4 mm P1 Phillips-head screw
that secures the number “2” wireless antenna transceiver to the chassis.
Guide the wireless antenna cables through the routing clips on the chassis.