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HP 14-ak099 Maintenance And Service Manual
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HP 14-ak099 Maintenance And Service Manual

HP 14-ak099 Maintenance And Service Manual

Chromebook
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HP Chromebook (model numbers 14-ak000
through 14-ak099)
HP Chromebook 14 G4
Maintenance and Service Guide
IMPORTANT! This document is intended for
HP authorized service providers only.

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Summary of Contents for HP 14-ak099

  • Page 1 HP Chromebook (model numbers 14-ak000 through 14-ak099) HP Chromebook 14 G4 Maintenance and Service Guide IMPORTANT! This document is intended for HP authorized service providers only.
  • Page 2 HP under bound by the terms of the HP End User License license. NVIDIA is a trademark of NVIDIA Agreement (EULA). If you do not accept these Corporation in the U.S.
  • Page 3 Safety warning notice WARNING! To reduce the possibility of heat-related injuries or of overheating the device, do not place the device directly on your lap or obstruct the device air vents. Use the device only on a hard, flat surface. Do not allow another hard surface, such as an adjoining optional printer, or a soft surface, such as pillows or rugs or clothing, to block airflow.
  • Page 4 Safety warning notice...

  • Page 5: Table Of Contents

    Table of contents 1 Product description ............................1 2 External component identification ........................3 Display ..................................3 Left side ................................. 4 Right side ................................5 Top ..................................6 TouchPad ............................. 6 Buttons ..............................7 Bottom ................................... 8 Labels ..................................9 3 Illustrated parts catalog ..........................
  • Page 6 System board ............................ 45 6 Specifications .............................. 47 7 Using HP PC Hardware Diagnostics (UEFI) ....................... 48 Downloading HP PC Hardware Diagnostics (UEFI) to a USB device ..............48 8 Power cord set requirements ........................50 Requirements for all countries ..........................50 Requirements for specific countries and regions ....................

  • Page 7: Product Description

    Storage Supports 16- and 32-GB embedded MultiMedia Controller (eMMC) Audio and video HP TrueVision HD slim webcam, 1280×720 by 30 frames per second; fixed (no tilt), with activity Single digital microphone with appropriate echo-cancellation, noise-suppression software Two speakers HD audio...
  • Page 8 Category Description USB 2.0 ports (2) Keyboard/pointing devices Full-sized, textured, island-style, Google keyboard (black) for use only on HP Chromebook 14 G4 Full-sized, textured, island-style, Google keyboard (white) for use only on HP Chromebook 14 Touchpad requirements: Multitouch gestures enabled...

  • Page 9: External Component Identification

    External component identification Display Component Description Internal display switch Turns off the display and initiates Sleep if the display is closed while the power is on. NOTE: The internal display switch is not visible from the outside of the computer. WLAN antennas* Send and receive wireless signals to communicate with wireless local area networks (WLANs).

  • Page 10: Left Side

    Left side Component Description Security cable slot Attaches an optional security cable to the computer. NOTE: The security cable is designed to act as a deterrent, but it may not prevent the computer from being mishandled or stolen. HDMI port Connects an optional video or audio device, such as a high- definition television, any compatible digital or audio component, or a high-speed High-Definition Multimedia...

  • Page 11: Right Side

    Component Description ● Off: The computer is off. Right side Component Description USB 2.0 ports Connect optional USB devices, such as a keyboard, mouse, external drive, printer, scanner or USB hub. AC adapter light ● White: The AC adapter is connected and the battery is charged.

  • Page 12: Top

    TouchPad Component Description TouchPad zone Moves the on-screen pointer and selects or activates items on the screen. Chapter 2 External component identification...

  • Page 13: Buttons

    Buttons Component Description Power button When the computer is off, press the button to turn on the ● computer. When the computer is in the Sleep state, press the button ● briefly to exit Sleep. When the computer is on and you want to lock the screen, ●...

  • Page 14: Bottom

    Bottom Component Description Speakers (2) Produce sound. Chapter 2 External component identification...

  • Page 15: Labels

    Labels The labels affixed to the computer provide information you may need when you troubleshoot system problems or travel internationally with the computer. IMPORTANT: All labels described in this section will be affixed to the bottom of the computer. NOTE: Your label may look slightly different from the illustration in this section.

  • Page 16: Illustrated Parts Catalog

    Illustrated parts catalog NOTE: HP continually improves and changes product parts. For complete and current information on supported parts for your computer, go to http://partsurfer.hp.com, select your country or region, and then follow the on-screen instructions. NOTE: Details about your computer, including model, serial number, product key, and length of warranty, are on the service tag at the bottom of your computer.
  • Page 17 Display assembly: The display assembly is spared at the subcomponent level only. For display assembly spare part information, see Display assembly subcomponents on page TouchPad (includes gasket) For use in HP Chromebook 14 G4 models 830874-001 For use in silver HP Chromebook models 830874-001...
  • Page 18 For use in Switzerland 830878-BG1 ● For use in the United Kingdom and Singapore 830878-031 ● For use in the United States for use only on HP Chromebook 14 PC 830878-001 HP Chromebook models with blue finish: ● For use in Belgium 830879-A41...
  • Page 19 System board equipped with a Intel Celeron N2840 processor, 2.0-GB of system 830017-001 memory, and 16-GB of eMMC primary storage For use in HP Chromebook 14 G4 models: ● System board equipped with a Intel Celeron N2940 processor, 4.0-GB of system...

  • Page 20: Display Assembly Subcomponents

    Display assembly subcomponents Item Description Spare part number Display bezel (includes Mylar) For use in HP Chromebook 14 G4 models: ● Silver 834907-001 For use in HP Chromebook models: ● Silver 830865-001 ● Blue 830866-001 ● Purple 830867-001 Webcam/microphone module (includes bezel Mylar)
  • Page 21 834904-001 For use in HP Chromebook models 830858-001 Display panel cable (includes bezel Mylar) For use in HP Chromebook 14 G4 models with HD displays 834908-001 For use in HP Chromebook 14 G4 models with FHD displays 841682-001 For use in HP Chromebook models with HD displays...

  • Page 22: Rubber Kit

    Miscellaneous parts Component Spare part number AC adapter 65-W HP Smart AC adapter (non-PFC, EM, 4.5-mm) for use on all computer models 714657-001 45-W HP Smart AC adapter (non-PFC, RC, 4.5-mm) for use on all computer models 741727-001 Power cord (3-pin, 1.0-meter, black):...
  • Page 23 Component Spare part number Screw Kit 830876-001 HP HDMI to VGA Adapter 701943-001 RJ-45 to USB adapter 539614-001 Miscellaneous parts...

  • Page 24: Removal And Replacement Preliminary Requirements

    Removal and replacement preliminary requirements Tools required You will need the following tools to complete the removal and replacement procedures: ● Flat-bladed screw driver ● Magnetic screw driver Phillips P0 screw driver ● Service considerations The following sections include some of the considerations that you must keep in mind during disassembly and assembly procedures.

  • Page 25: Cables And Connectors

    Cables and connectors CAUTION: When servicing the computer, be sure that cables are placed in their proper locations during the reassembly process. Improper cable placement can damage the computer. Cables must be handled with extreme care to avoid damage. Apply only the tension required to unseat or seat the cables during removal and insertion.
  • Page 26 CAUTION: To prevent damage to the computer when you are removing or installing internal components, observe these precautions: Keep components in their electrostatic-safe containers until you are ready to install them. Before touching an electronic component, discharge static electricity by using the guidelines described in this section.

  • Page 27: Packaging And Transporting Guidelines

    Packaging and transporting guidelines Follow these grounding guidelines when packaging and transporting equipment: To avoid hand contact, transport products in static-safe tubes, bags, or boxes. ● ● Protect ESD-sensitive parts and assemblies with conductive or approved containers or packaging. Keep ESD-sensitive parts in their containers until the parts arrive at static-free workstations. ●...
  • Page 28 Equipment guidelines Grounding equipment must include either a wrist strap or a foot strap at a grounded workstation. ● When seated, wear a wrist strap connected to a grounded system. Wrist straps are flexible straps with a minimum of one megohm ±10% resistance in the ground cords. To provide proper ground, wear a strap snugly against the skin at all times.

  • Page 29: Removal And Replacement Procedures For Authorized Service Provider Parts

    Accessing these parts can damage the computer or void the warranty. NOTE: HP continually improves and changes product parts. For complete and current information on supported parts for your computer, go to http://partsurfer.hp.com, select your country or region, and then follow the on-screen instructions. Component replacement procedures There are as many as 48 screws that must be removed, replaced, and/or loosened when servicing the computer.
  • Page 30 Singapore For use in Italy 830878-061 For use in the United States 830878-001 Keyboard/top cover in blue finish for use only on HP Chromebook models: For use in Belgium 830879-A41 For use in the Netherlands 830879-B31 For use in Canada...
  • Page 31 The feet/screw covers are included in the Rubber Kit, spare part number 834911-001 for use only on HP Chromebook 14 G4 models and 830875-001 for use only on HP Chromebook models. Remove the 13 Phillips PM2.0×5.0 screws that secure the keyboard/top cover to the base enclosure.
  • Page 32 Release the zero insertion force (ZIF) connector (3) to which the keyboard cable is attached, and then disconnect the keyboard cable (4) from the system board. Release the ZIF connector (5) to which the TouchPad cable is attached, and then disconnect the TouchPad cable (6) from the system board.

  • Page 33: Touchpad

    TouchPad Description Spare part number TouchPad for use in HP Chromebook 14 G4 models (includes gasket) 830874-001 TouchPad for use in silver HP Chromebook models (includes gasket) 830874-001 TouchPad for use in blue HP Chromebook models (includes gasket) 835047-001 TouchPad for use in purple HP Chromebook models (includes gasket)
  • Page 34 Remove the TouchPad (4). Reverse this procedure to install the TouchPad. Chapter 5 Removal and replacement procedures for Authorized Service Provider parts...

  • Page 35: Power Connector Cable

    Power connector cable Description Spare part number Power connector cable 841638-001 Before removing the power connector cable, follow these steps: Turn off 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. Disconnect the power from the computer by unplugging the power cord from the computer.

  • Page 36: Usb Board

    USB board Description Spare part number USB board 830873-001 USB board cable 830869-001 Before removing the USB board, follow these steps: Turn off 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. Disconnect the power from the computer by unplugging the power cord from the computer.

  • Page 37: Wlan/Bluetooth Combo Card

    WLAN/Bluetooth combo card The computer uses a card that provides both WLAN and Bluetooth functionality. Description Spare part number Intel Dual Band Wireless-AC 7260 802.11 ac 2x2 WiFi + BT 4.0 Combo Adapter 784645-005 Intel Dual Band Wireless-N 7260AN 802.11 a/b/g/n 2x2 WiFi + BT 4.0 combo adaptor 784647-005 Before removing the WLAN module, follow these steps: Turn off the computer.
  • Page 38 Remove the WLAN module (3) by pulling the module away from the slot at an angle. NOTE: WLAN modules are designed with a notch to prevent incorrect insertion. 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, as shown in the following illustration.

  • Page 39: Heat Sink

    Heat sink Description Spare part number Heat sink (includes alcohol pad, thermal tape, and thermal grease) 830871-001 Before removing the heat sink, follow these steps: Turn off 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.
  • Page 40 Remove the heat sink (2). NOTE: The thermal material must be thoroughly cleaned from the surfaces of the system board and the heat sink components each time the heat sink is removed. Thermal paste is used on the processor (1) and the heat sink section (2) that services it. Reverse this procedure to install the heat sink.

  • Page 41: Display Assembly

    Display assembly Before removing the display assembly, follow these steps: Turn off 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. Disconnect the power from the computer by unplugging the power cord from the computer. Disconnect all external devices from the computer.
  • Page 42 When lifting the bezel, make sure the mylar between the bezel and panel does not pull free from the panel. The display bezel is available using the following spare part numbers: 834907-001–For use on HP Chromebook 14 G4 models ● ●...
  • Page 43 Disconnect the webcam/microphone module cable (2) from the webcam/microphone module. Remove the webcam/microphone module. The webcam/microphone module is available using spare part number 834912-001 for use on HP Chromebook 14 G4 models or 830877-001 for use on HP Chromebook models.
  • Page 44 Lift the top edge of the display panel (2) and swing it up and forward until it rests upside down in front of the display enclosure. The raw display panel is available using spare part number 830015-001 for HD displays and 830016-001 for FHD displays.
  • Page 45 Remove the display hinges (4). The display hinges are included in the Display Hinge Kit, spare part number 834909-001 for use on HP Chromebook 14 G4 models or 830872-001 on HP Chromebook models. If it is necessary to replace the display panel cable: Disconnect the display panel cable from the webcam/microphone module (1).
  • Page 46 Remove the antenna cable (3). The antenna cable is available using spare part number 834904-001 for HP Chromebook 14 G4 models and 830858-001 for HP Chromebook models. The display rear cover is available using the following spare part numbers:...
  • Page 47 ● 834905-001–For use on HP Chromebook 14 G4 models 830859-001–For use on silver HP Chromebook models ● ● 830860-001–For use on blue HP Chromebook models 830861-001–For use on purple HP Chromebook models ● Reverse this procedure to reassemble and install the display assembly.

  • Page 48: Battery

    Battery Description Spare part number Battery, 3-cell, 37-WHr, 3.28-AHr, Li-ion 816609-005 Before removing the battery, follow these steps: Turn off 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. Disconnect the power from the computer by unplugging the power cord from the computer.
  • Page 49 Lift the battery from the computer (2). Reverse this procedure to install the battery. Component replacement procedures...

  • Page 50: Speakers

    Speakers Description Spare part number Speakers (include left and right speakers and cables) 787723-001 Before removing the speakers, follow these steps: Turn off 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. Disconnect the power from the computer by unplugging the power cord from the computer.

  • Page 51: System Board

    Equipped with a Intel Celeron N2840 processor, 2.0-GB of system memory, and 16-GB of eMMC primary storage 830017-001 System board for use in HP Chromebook 14 G4 models (includes alcohol pad, thermal tape, and thermal grease): Equipped with a Intel Celeron N2940 processor, 4.0-GB of system memory, and 32-GB of eMMC primary storage 839038-001 Equipped with a Intel Celeron N2940 processor, 2.0-GB of system memory, and 32-GB of eMMC primary storage...
  • Page 52 Disconnect the power connector cable (4) from the system board. Remove the four Philllips PM2.0×2.0 screws (1) that secure the system board to the base enclosure. Lift the right side of the system board (2) until it rests at an angle. Remove the system board (3) by sliding it up and to the right at an angle.

  • Page 53: Specifications

    Specifications Metric U.S. Computer dimensions Width 34.4 cm 13.5 in Depth 24.0 cm 9.5 in Height 1.8 cm 0.7 in Weight 1.7 kg 3.8 lbs Operating voltage and current: 19.5V dc @ 2.31 A – 45 W 19.5V dc @ 3.33 A – 65 W NOTE: This product is designed for IT power systems in Norway with phase-to-phase voltage not exceeding 240 V rms.

  • Page 54: Using Hp Pc Hardware Diagnostics (Uefi)

    Using HP PC Hardware Diagnostics (UEFI) HP PC Hardware Diagnostics is a Unified Extensible Firmware Interface (UEFI) that allows you to run diagnostic tests to determine whether the computer hardware is functioning properly. The tool runs outside the operating system so that it can isolate hardware failures from issues that are caused by the operating system or other software components.
  • Page 55 Use the categories listed to find your product. – or – Click Find Now to let HP automatically detect your product. Select your computer, and then select your operating system. In the Diagnostic section, follow the on-screen instructions to select and download the UEFI version you want.

  • Page 56: Power Cord Set Requirements

    Power cord set requirements The wide-range input feature of the computer permits it to operate from any line voltage from 100 to 120 volts AC, or from 220 to 240 volts AC. The 3-conductor power cord set included with the computer meets the requirements for use in the country or region where the equipment is purchased.
  • Page 57 Country/region Accredited agency Applicable note number South Korea Sweden CEMKO Switzerland Taiwan BSMI The United Kingdom The United States The flexible cord must be Type HO5VV-F, 3-conductor, 1.0-mm² conductor size. Power cord set fittings (appliance coupler and wall plug) must bear the certification mark of the agency responsible for evaluation in the country or region where it will be used. The flexible cord must be Type SPT-3 or equivalent, No.

  • Page 58: Statement Of Memory Volatility

    Following system shutdown and removal of all power sources from an HP Business PC system, personal data can remain on volatile system memory (DIMMs) for a finite period of time and will also remain in nonvolatile memory.
  • Page 59 If a DriveLock password is set, select the Security menu, and scroll down to Hard Drive Utilities under the Utilities menu. Select Hard Drive Utilities, select DriveLock, then uncheck the checkbox for DriveLock password on restart. Select OK to proceed. Select the Main menu, and then select Reset BIOS Security to factory default.
  • Page 60 NOTE: If the system has a BIOS administrator password, enter the password at the prompt. Select Main, select Restore Defaults, and then select Yes to load defaults. Select the Security menu, select Restore Security Level Defaults, and then select Yes to restore security level defaults.
  • Page 61 NOTE: The amount of time it takes for Disk Sanitizer to run can take several hours. Plug the computer into an AC outlet before starting. Turn on or restart the computer, and then press while the “Press the ESC key for Startup Menu” message is displayed at the bottom of the screen.

  • Page 62: Nonvolatile Memory Usage

    HP Sure Start only) backup of The content is managed Embedded Controller. critical System solely by the HP Sure Start BIOS code, EC Embedded Controller. firmware, and critical PC configuration data for select...
  • Page 63 Fingerprint reader 512 KByte flash Stores Fingerprint reader memory is Only a digitally signed fingerprint programmed by user application can make the templates. enrollment in HP call to write to the flash. ProtectTools Security Manager. Nonvolatile memory usage...

  • Page 64: Questions And Answers

    HP has provided options in Computer Setup (BIOS) to allow you to run in legacy BIOS, if required by the operating system. Examples of this requirement would be if you upgrade or downgrade the OS.

  • Page 65: Using Hp Sure Start (Select Models Only)

    BIOS to its previously safe state, without user intervention. Those select computer models ship with HP Sure Start configured and enabled. HP Sure Start is configured and already enabled so that most users can use the HP Sure Start default configuration. The default configuration can be customized by advanced users.

  • Page 66: 10 Recycling

    Follow the local laws and regulations in your area for battery disposal. HP encourages customers to recycle used electronic hardware, HP original print cartridges, and rechargeable batteries. For more information about recycling programs, see the HP Web site at http://www.hp.com/recycle.

  • Page 67: Index

    38 spare part numbers 15, 40 Display Hinge Kit, spare part spare part numbers 15, 39 antennas numbers 15, 39 HP PC Hardware Diagnostics (UEFI) disconnecting 31 display panel using 48 audio, product description 1 product description 1 HP Sure Start 59...
  • Page 68 microphone (audio-in) jack, product name 1 TouchPad identifying 4 product name and number, removal 27 model name 1 computer 9 spare part number 11, 27 touchpad cable spare part numbers 11 nonvolatile memory 52 regulatory information TouchPad zone, identifying 6 regulatory label 9 transporting guidelines 21 wireless certification labels 9...

This manual is also suitable for:

14-ak000Hp chromebook 14 g4

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