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HP 100B All-in-One PC - Removal and Replacement Procedures All-in One (AIO) Chassis

The following sections provide information about disassembling various components of the HP Pro All-in-One.
Preparing to Disassemble the Computer
To avoid injury and equipment damage, always complete the following steps in order, when opening the HP Pro All-in-One.
  1. Remove all media (CD, DVD, etc.) from the computer.
  2. Shut down the computer.
  3. After the system has completely shut down, disconnect the power adapter from the back of the computer.
  4. Disconnect all other attached cables from the back of the computer.
  5. Place the computer face down on a soft flat surface. HP recommends that you set down a blanket, towel, or other soft cloth to protect the touch screen surface from scratches or other damage.
  warning:
Beware of sharp edges inside the chassis.
Rear Cover
Description
Spare part number
Rear cover
646781-001
The computer has one main cover on the back. Remove it to gain access to internal components.
To remove the rear cover:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Lift the stand.
    Figure :
  3. Remove the five Torx T15M3.0x8.0 screws that secure the rear cover to the computer.
    Figure :
  4. Use a flat tool to pry open the slots on the bottom of the computer.
    Figure :
  5. Lift the rear cover off the computer.
    Figure :
To replace the rear cover, reverse the removal procedures.
Feet
Description
Spare part number
Foot, right
646784-001
Foot, left
646785-001
Each foot is connected to the computer with one screw. The top of the foot is positioned under the display panel bracket. You must slide the foot out from under the bracket to remove it, and place it back under the bracket to install it.
To remove the feet:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. For each foot, remove the Torx T15 3.0x6.0 screw (1) that secures the foot to the computer.
  4. Slide the foot away out from under the display panel bracket and away from the computer (2).
    Figure :
To replace the feet, reverse the removal procedures.
When reinstalling a foot, make sure you slide the top of the foot under the display panel bracket before securing the screw.
Stand
Description
Spare part number
Stand
646783-001
The stand is secured with four screws.
To remove the stand:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Remove the four Torx T15M4.0x8.0 screws that secure the stand to the rear cover.
    Figure :
  4. Lift the stand off the cover.
    Figure :
To replace the stand, reverse the removal procedures.
Optical Drive
Description
Spare part number
8X DVD±RW SuperMulti DL Drive with LightScribe without bezel
619238-001
8X DVD±RW SuperMulti DL Drive with LightScribe with bezel
646803-001
Optical drive bezel
646804-001
The optical drive is located under the rear cover on the left side of the computer (when viewed from behind). It is secured with one screw.
Optical drive location
Figure :
To remove the optical drive:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Loosen the captive screw that secures the optical drive to the computer.
    Figure :
  4. Insert a tool into the slot to push the drive out of the bay, and then slide the drive out of the computer.
    Figure :
To install an optical drive, reverse the removal procedures.
Hard Drive
Description
Spare part number
750-GB
632938-001
500-GB
621421-001
250-GB
621419-001
Hard drive grommets (screws)
646791-001
The hard drive is located under the rear cover on the left side of the computer (when viewed from behind). The drive is secured with one captive screw and is housed in a removable cage.
Hard drive location
Figure :
To remove the hard drive:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Loosen the captive screw that secures the drive to the computer.
    Figure :
  4. Slide the drive to the left to disconnect the cables.
    Figure :
  5. Using the drive cage handle, lift the drive out of the computer.
    Figure :
  6. To remove the hard drive from the hard drive cage, remove the four Phillips screws that secure the drive to the cage, and then slide the drive out of the cage.
    Figure :
    Figure :
To replace the hard drive, reverse the removal procedures.
Memory
Description
Spare part number
4-GB
646801-001
2-GB
646800-001
1-GB
647448-001
Memory modules are located on the right side of the computer (when viewed from behind) under the memory cover. The computer has two memory slots.
Memory location
Figure :
To remove a memory module:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Loosen the memory cover screw.
    Figure :
  4. Lift the memory cover off the computer.
    Figure :
  5. Open both latches of the memory module socket, and then remove the memory module from the socket.
    Figure :
    Figure :
      note:
    If you are removing both cards, you must remove the upper one before removing the lower one.
To install a memory module, reverse the removal procedures.
Fan
Description
Spare part number
Fan
646798-001
The fan is located at the top of the computer.
Fan location
Figure :
To remove the fan:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Disconnect the fan cable from the system board connector.
    Figure :
  4. Remove the four Phillips PM25x60 screws that secure the fan to the computer.
    Figure :
  5. Lift the fan out of the computer.
    Figure :
To install the fan, reverse the removal procedures.
Speakers
Description
Spare part number
Speaker, right
646792-001
Speaker, left
646793-001
The speakers are located at the bottom of the computer. Two screws secure each speaker. Each speaker connects to the system board..
Speaker location
Figure :
To remove the speakers:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Remove two Phillips PM30x100 screws that secure each speaker to the computer.
    Figure :
    Figure :
  4. Remove the left speaker wire from the routing path.
    Figure :
  5. Disconnect the speaker cables from the system board connectors.
    Figure :
  6. Lift the speakers from the computer.
    Figure :
To install the speakers, reverse the removal procedures.
Webcam Module and Cable
Description
Spare part number
Webcam module cable
646786-001
The webcam module assembly is located at the top of the computer. It is secured with three screws and has one connector. A removable bracket houses the module. The webcam cable routes along the top of the computer from the left side of the module to the system board. Tape secures the cable to the computer.
Webcam module location
Figure :
To remove the webcam module cable:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Disconnect the cable from the webcam module (1) and from the system board (2).
  4. Remove the tape (3) that secures the cable to the computer, and then lift the cable from the computer.
    Figure :
  5. Remove the webcam module cable from the computer.
To remove the webcam module:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Remove the three Phillips PM20x30 screws (1) that secure the webcam module assembly to the computer.
  4. Lift the webcam assembly up as much as the cable allows (2), and then disconnect the cable from the module (3).
    Figure :
  5. Remove the webcam module assembly from the computer.
  6. To remove the webcam module from the bracket, remove the two Phillips PM20x30 screws that secure the module to the bracket, and then remove the module from the bracket.
    Figure :
To install a webcam module, reverse the removal procedures.
Hard Drive Cable
Description
Spare part number
Hard drive cable
646789-001
The hard drive cable is secured to the computer with two screws and connects the hard drive to the system board.
Hard drive cable location
Figure :
To remove the hard drive cable:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Remove the two Torx T15M3.0x6.0 screws (1) that secure the connector to the computer.
  4. Disconnect the connector from the hard drive (2) and from the system board (3).
  5. Remove the tape securing the cable to the computer (4), and then lift the connector from the computer.
    Figure :
To install the hard drive cable, reverse the removal procedures.
Optical Drive Cable
Description
Spare part number
Optical drive cable
646790-001
The optical drive cable is secured to the computer with two screws and connects the optical drive to the system board.
Optical drive cable location
Figure :
To remove the optical drive cable:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Remove the two Torx T15M3.0x6.0 screws (1) that secure the connector to the computer.
  4. Disconnect the connector from the optical drive (2) and from the system board (3).
  5. Remove the tape securing the cable to the computer, and then lift the connector from the computer.
    Figure :
To install the optical drive cable, reverse the removal procedures.
Optical Drive Bracket
Description
Spare part number
Optical drive bracket
646805-001
The optical drive bracket is located under the optical drive. You must remove the optical drive to access the bracket, which is secured by five screws.
To remove the optical drive bracket:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Remove the optical drive (see Optical Drive).
  4. Remove the five Torx T15M3.0x6.0 screws (1) that secure the optical drive bracket to the computer.
  5. Lift the bracket from the computer (2).
    Figure :
To install the optical drive bracket, reverse the removal procedures.
Inverter Board
Description
Spare part number
Inverter for use with Samsung/CMI display panels
646796-001
Inverter for use with LG display panels
646797-001
Inverter board cable
646788-001
The inverter board is located on the left side of the computer under the optical drive. You must remove the optical drive and the optical drive bracket to gain access to the inverter board. The inverter board is secured with two screws and has three connectors.
Inverter board location
Figure :
To remove the inverter board:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Remove the optical drive (see Optical Drive).
  4. Remove the optical drive bracket (see Optical Drive Bracket).
  5. Remove the two Torx T15M3.0x6.0 screws (1) that secure the board to the computer.
  6. Disconnect the three cables from the board (2).
      note:
    Be careful not to damage the cables when disconnecting them from the board. Do not pull on the wires.
    Figure :
  7. Remove the inverter board from the computer.
To remove the inverter board:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Remove the optical drive (see Optical Drive).
  4. Remove the optical drive bracket (see Optical Drive Bracket).
  5. Remove the tape that secures the cable to the computer.
  6. Lift the cable from the computer.
    Figure :
To install the inverter board cable, reverse the removal procedures.
Power Button Board and Cable
Description
Spare part number
Power button board cable
646782-001
The power button board is located on the top right side of the computer (when viewed from the back). It is secured with two screws and has one connector.
The power button board cable connects to the bottom of the board and to the system board.
Power button board location
Figure :
To remove the power button board:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Remove the tape (1) and three screws (2) that secure the board to the computer.
      note:
    Note the location of the grounding cables for proper replacement.
  4. Lift the board as far as the cables allow, and then disconnect the two cables from the board (3).
      note:
    Be careful not to damage the cables when disconnecting them from the board. Do not pull on the wires.
    Figure :
  5. Remove the board from the computer.
To remove the power button board cable:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Disconnect the cable from the power button board (1) and the system board (2).
  4. Remove the tape (3) that secures the cable to the computer, and then remove the cable from the clip built into the computer (4).
    Figure :
  5. Remove the cable from the computer.
To install the power button board cable, reverse the removal procedures.
System Board Shield
The system board shield sits above the system board. It is secured with five screws. You must disconnect several cables that route to the system board to remove the shield.
System board location
Figure :
To remove the system board shield:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Disconnect the following cables from the system board:
    • WLAN cable
    • Inverter cable
    • Power button board cable
    • Webcam cable
  4. Remove the five Torx T15M3.0x6.0 screws that secure the shield to the computer.
    Figure :
  5. Lift the shield from the computer.
To install the system board shield, reverse the removal procedures.
Heat Sink (Thermal Module)
Description
Spare part number
Heat sink (thermal module)
646799-001
The heat sink is secured with three captive screws.
To remove the heat sink:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the system board shield (see System Board Shield).
  3. In the order indicated by the numbers stamped into the heat sink, remove the three screws that secure the heat sink to the system board.
    Figure :
  4. Lift the heat sink off the system board.
To replace the heat sink, reverse the removal procedures.
WLAN Module
Description
Spare part number
WLAN module (802.11a/b/g/n)
634906-001
WLAN cable and antenna
646806-001
The WLAN module is located on the left side of the system board. You must remove the system board shield to gain access to the module. One screw and one antenna connect to the module. The antenna cable routes from the module to the antenna at the top of the computer.
WLAN module location
Figure :
To remove the WLAN module:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Remove the system board shield (see System Board Shield).
  4. Disconnect the antenna cable from the module (1), and then remove the screw (2) that secures the module to the computer.
    Figure :
  5. Lift the module to a 45-degree angle (3), and then remove it from the system board (4).
    Figure :
To remove the WLAN module antenna and cable:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Remove the system board shield (see System Board Shield).
  4. Disconnect the antenna cable from the module (1), remove the cable from the clips built into the computer (2), and then lift the antenna from the top of the computer (3).
    Figure :
To install the WLAN module cable and antenna, reverse the removal procedures.
  note:
WLAN modules are designed with a notch to prevent incorrect insertion.
System Board
Description
Spare part number
System board with AMD dual core processor (includes thermal material)
644692-001
System board with AMD single core processor (includes thermal material)
644693-001
The system board is located on the upper right side of the computer (when viewed from the rear), under the system board shield. It is secured with five screws.
To remove the system board:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Remove the memory modules (see Memory).
  4. Remove the system board shield (see System Board Shield).
  5. Remove the WLAN module (see WLAN Module).
  6. Disconnect all cables from the system board, noting their location for reinstallation.
  7. Remove the five Torx T15M3.0x6.0 screws that secure the system board to the computer.
    Figure :
      note:
    For installation, the system board screw holes are labeled M3.
  8. Lift the system board up and out of the computer.
To install the system board, reverse the removal procedures.
Front Bezel
Description
Spare part number
Front bezel
646780-001
The front bezel is secured to the display panel bracket with eight screws.
To remove the front bezel:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Remove the optical drive (see Optical Drive).
  4. Remove the hard drive (see Hard Drive).
  5. Remove the fan (see Fan).
  6. Remove the speakers (see Speakers).
  7. Remove the hard drive cable (see Hard Drive Cable).
  8. Remove the optical drive cable (see Optical Drive Cable).
  9. Remove the inverter board (see Inverter Board).
  10. Remove the heat sink (see Heat Sink (Thermal Module)).
  11. Remove the system board shield (see System Board Shield).
  12. Remove the system board (see System Board).
  13. Push the display cable through the hole in the cover.
  14. Move aside any remaining cables that impede removal of the cover.
  15. Remove the eight screws that secure the bezel to the display bracket.
    Figure :
  16. Separate the bezel from the display panel bracket.
To replace the front bezel, reverse the removal procedures.
Display Panel
Description
Spare part number
Display, 20-inch, LG
646795-001
Display, 20-inch, Samsung/CMI
646794-001
After you remove the front bezel and feet, the display bracket is secured with four remaining screws.
A metal bracket houses the display panel. You must remove the display panel from the bracket to replace the raw panel.
To remove the display panel:
  1. Prepare the computer for disassembly (see Preparing to Disassemble the Computer).
  2. Remove the rear cover (see Rear Cover).
  3. Remove the optical drive (see Optical Drive).
  4. Remove the hard drive (see Hard Drive).
  5. Remove the fan (see Fan).
  6. Remove the speakers (see Speakers).
  7. Remove the hard drive cable (see Hard Drive Cable).
  8. Remove the optical drive cable (see Optical Drive Cable).
  9. Remove the inverter board (see Inverter Board).
  10. Remove the heat sink (see Heat Sink (Thermal Module)).
  11. Remove the system board shield (see System Board Shield).
  12. Remove the system board (see System Board).
  13. Remove the front bezel (see Front Bezel).
  14. Push the display cable through the hole in the cover.
  15. Remove the six screws from the right and left sides of the bracket and remove it from the frame.
    Figure :
  16. Remove the two screws that secure the LCD inverter, and then remove it from LCD bracket.
    Figure :
  17. Remove the four screws from the LCD brackets, and then remove them from the LCD module.
    Figure :
To replace the display panel, reverse the removal procedures.

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