HP EliteDesk 800 G4 Maintenance and Service Guide

HP EliteDesk 800 G4 Manual

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  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 1
    Maintenance and Service Guide HP EliteDesk 800 G4 SFF Business PC
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 2
    . Some features may not be available on your product. To access the latest user guide, go to http://www.hp.com/support, and follow the instructions to find your product. Then select User Guides. Software terms By installing, copying, downloading, or otherwise using any software product preinstalled
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - 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
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 4
    iv Safety warning notice
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 5
    cleaning safety precautions 12 Cleaning the computer case ...12 Cleaning the keyboard ...12 Cleaning the monitor ...13 Cleaning the mouse ...13 Service considerations ...13 Power supply fan ...13 Tools and software requirements ...13 Screws ...13 Cables and connectors ...14 Hard Drives ...14
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    port ...53 Fan sink ...54 Fan ...57 Processor ...58 Power supply ...59 Speaker ...60 System board ...61 System board callouts ...64 Changing from desktop to tower orientation ...65 5 Computer Setup (F10) Utility ...66 Computer Setup (F10) Utilities ...66 Using Computer Setup (F10) Utilities 66 vi
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 7
    ...73 Computer Setup-UEFI Drivers ...78 Recovering the Configuration Settings ...78 6 Troubleshooting without diagnostics ...79 Safety and comfort ...79 Before you call for technical support ...79 Helpful hints ...80 Solving general problems ...81 Solving power problems ...85 Solving hard drive
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    Diagnostics Windows by product name or number (select products only 118 Installing HP PC Hardware Diagnostics Windows 118 Using HP PC Hardware Diagnostics UEFI ...118 Starting HP PC Hardware Diagnostics UEFI 119 Downloading HP PC Hardware Diagnostics UEFI to a USB flash drive 119 Downloading the
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 9
    may vary depending on the model. For support assistance and to learn more about the hardware and software installed on your computer model, run the HP Support Assistant utility. NOTE: This computer model can be used in a tower orientation or a desktop orientation. Standard configuration features
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    activity light 5 USB 2.0 port 10 Power button NOTE: The combo jack supports headphones, line output devices, microphones, line input devices, or CTIA style the power is on. If it is flashing red, there is a problem with the computer and it is displaying a diagnostic code. Refer to Interpreting
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    Gbit/s data speed) NOTE: Your model may have additional optional ports available from HP. When a graphics card is installed in one of the system board slots, . The system board graphics can be disabled by changing settings in BIOS F10 Setup. Serial number location Each computer has a unique serial
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 12
    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. Computer major components Item (1) (2) (3) (4) (5) (6) (7) Description Access panel Power
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 13
    + Bluetooth 5.0 Combo Adapter (non-vPro) Realtek RTL8821CE 802.11 ac 1x1 WiFi + BT 4.2 Combo Adapter (MU-MIMO supported) Realtek RTL8822BE 802.11 ac 2x2 WiFi + BT 4.2 Combo Adapter (MU-MIMO supported) (10) Solid-state drives, NVMe, M.2 2280, PCIe 1 TB, TLC 512-GB, TLC 512-GB, self-encrypting
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    Item (14) (15) (16) (17) (18) (19) (20) (21) (22) Description Intel Pentium G5500 processor Intel Pentium G5400 processor Intel Celeron G4900 processor RTC battery Bezel blank, slim optical drive Memory module (UDIMM, non-ECC, 1.2v, PC4-2666) 16-GB 8-GB 4-GB Front bezel System board (includes
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 15
    (SED) 256-GB (25) Optical drives, 9.5 mm DVD Blu-ray-writer DVD±RW drive DVD-ROM drive Stand (not illustrated) Miscellaneous parts Description HP USB-Type C to USB Type-A Hub SATA drive power cable DisplayPort cable DVI monitor cable Adapters DisplayPort to VGA DisplayPort to DVI DisplayPort
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 16
    Description Smart card, slim, CCID, USB USB Conferencing, USB Slim, PS/2 USB, slim Wireless keyboard and mouse Slim, PCR, USB (Brazil and Latin America) Anti-microbial, slim Grey, slim, USB Collaboration, USB Collaboration, wireless Wireless, premium Premium, USB Health care, wired, USB Premium,
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 17
    described in this chapter is essential for proper service. CAUTION: When the computer is plugged into 7,000 V 5,000 V These are then multi-packaged inside plastic tubes, trays, or Styrofoam. 40% 15,000 V 5,000 V 800 V 700 V 4,000 V 5,000 V 20,000 V 11,000 V 10% 35,000 V 12,000 V 6,000 V
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 18
    directly contact dissipative surfaces. ● Keep work area free of nonconductive materials such as ordinary plastic assembly aids and Styrofoam. ● Use field service tools, such as cutters, screwdrivers, and vacuums, that are conductive. 10 Chapter 3 Routine care, SATA drive guidelines, and disassembly
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    with ground cord of one-megohm +/- 10% resistance ● Static-dissipative table or floor mats with hard tie to ground ● Field service kits ● Static awareness labels ● Wrist straps and footwear straps providing one-megohm +/- 10% resistance ● Material handling packages ● Conductive plastic bags
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 20
    ● Never cover the ventilation slots on the monitor with any type of material. ● Install or enable power management functions of the operating system or other software, including sleep states. Routine care General cleaning safety precautions 1. Never use solvents or flammable solutions to clean the
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    To clean the mouse body, follow the procedures in Cleaning the computer case on page 12. Service considerations Listed below are some of the considerations that you should keep in mind during the disassembly and used during the reassembly process, it can damage the unit. HP Service considerations 13
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    parts being removed or replaced. CAUTION: When servicing this computer, ensure that cables are placed chassis you are working on in this guide for instructions on the replacement procedures. WARNING! This or return them to HP, their authorized partners, or their agents.
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    designed to transmit data for only a single drive. SMART ATA drives The Self Monitoring Analysis and Recording Technology (SMART) ATA drives for the HP Personal Computers have built-in drive failure prediction that warns the user or network administrator of an impending failure or crash of the hard
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 24
    Cable management Always follow good cable management practices when working inside the computer. ● Keep cables away from major heat sources like the heat sink. ● Do not jam cables on top of expansion cards or memory modules. Printed circuit cards like these are not designed to take excessive
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    and precautions described in this chapter is essential for proper service. After completing all necessary removal and replacement procedures, run all components operate properly. NOTE: Not all features listed in this guide are available on all computers. Preparation for disassembly See Routine care,
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    Access panel 1. Prepare the computer for disassembly (Preparation for disassembly on page 17). 2. Slide the access panel release lever to the left (1) so that it locks into place. Then slide the access panel back (2) and lift it off the computer (3). To install the access panel, reverse the removal
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    Front bezel 1. Prepare the computer for disassembly (Preparation for disassembly on page 17). 2. Remove the access panel (Access panel on page 18). 3. Lift up the three tabs on the top of the bezel (1), and then rotate the bezel off the chassis (2). To install the front bezel, reverse the removal
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    bezel (2). NOTE: After removing the slim optical drive bezel blank and installing a slim optical drive, you can install an optional bezel trim piece (available from HP) that surrounds the front of the slim optical drive. 20 Chapter 4 Removal and replacement procedures
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    that the dust collected on the filter does not impede air flow through the computer. NOTE: The optional front bezel dust filter is available from HP. To remove, clean, and replace the dust filter: 1. Prepare the computer for disassembly (Preparation for disassembly on page 17). 2. To remove the dust
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    System board connections Refer to the following illustration and table to identify the system board connectors for your model. Item System board connector System board label 1 PCI Express x16 downshifted to X4PCIEXP a x4 2 PCI Express x1 X1PCIEXP2 3 PCI Express x1 X1PCIEXP1 4 PCI
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    inline memory modules (DIMMs). The memory sockets on the system board are populated with at least one preinstalled memory module. To achieve the maximum memory support, you can populate the system board with up to 64 GB of memory configured in a high-performing dual-channel mode. For proper system
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    DIMM and one 1 GB DIMM, and Channel B should be populated with the other two 1 GB DIMMs. With this configuration, 4 GB will run as dual-channel and 1 GB will run as single-channel. ● In any mode, the maximum operational speed is determined by the slowest DIMM in the system. IMPORTANT: You must
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    5. Push the module down into the socket, ensuring that the module is fully inserted and properly seated. Make sure the latches are in the closed position (3). 6. Replace the access panel. 7. If the computer was on a stand, replace the stand. 8. Reconnect the power cord and turn on the computer. 9.
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    sockets, one PCI Express x16 expansion socket, and one PCI Express x16 expansion socket that is downshifted to a x4 socket. NOTE: The PCI Express sockets support only low profile cards. You can install a PCI Express x1, x4, x8, or x16 expansion card in the PCI Express x16 socket. For dual graphics
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    b. If you are removing a PCI Express x1 card, hold the card at each end and carefully rock it back and forth until the connectors pull free from the socket. Lift the card straight up (1) then away from the inside of the chassis (2) to remove it. Be sure not to scrape the card against other
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    c. If you are removing a PCI Express x16 card, pull the retention arm on the back of the expansion socket away from the card (1) and carefully rock the card back and forth until the connectors pull free from the socket. Lift the card straight up (2) then away from the inside of the chassis (3) to
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    8. To install a new expansion card, hold the card just above the expansion socket on the system board then move the card toward the rear of the chassis (1) so that the bottom of the bracket on the card slides into the small slot on the chassis. Press the card straight down into the expansion socket
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    Drives For a list of available drives, see Computer major components on page 4. Drive positions Drive positions 1 3.5-inch secondary hard drive bay 2 3.5-inch primary hard drive bay 3 2.5-inch hard drive bay 4 9.5 mm slim optical drive bay NOTE: The drive configuration on your computer may be
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 39
    IMPORTANT: To prevent loss of work and damage to the computer or drive: If you are inserting or removing a drive, shut down the operating system properly, turn off the computer, and unplug the power cord. Do not remove a drive while the computer is on or in standby mode. Before handling a drive, be
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 40
    4. Push the green release latch on the right rear side of the drive toward the center of the drive (1), and then slide the drive forward and out of the bay (2). 32 Chapter 4 Removal and replacement procedures
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    Installing a 9.5 mm slim optical drive 1. Prepare the computer for disassembly (Preparation for disassembly on page 17). 2. Remove the access panel (Access panel on page 18). 3. If you are installing a slim optical drive in a bay covered by a bezel blank, remove the front bezel and then remove the
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 42
    6. Connect the power cable and data cable to the rear of the drive. 7. Connect the opposite end of the data cable to one of the light-blue SATA connectors on the system board labeled SATA1 or SATA2. NOTE: Refer to System board connections on page 22 for an illustration of the system board drive
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    4. Pull the release lever next to the rear of the hard drive outward (1). While pulling the release lever out, lift the rear of the drive up (2), and then slide the front of the drive back and lift it out of the bay (3). 5. Remove the four mounting screws (two on each side) from the old drive. You
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    from the old hard drive to the new hard drive. If you are adding a second 3.5-inch hard drive, you can purchase extra mounting screws from HP. ● Install four silver-and-blue 6-32 mounting screws (two on each side of the drive). ● You can also install a 2.5-inch hard drive into a 3.5-inch drive
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    - Secure the drive to the bay adapter bracket by installing four black M3 adapter bracket screws through the underside of the bracket and into the drive. Drives 37
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    - Install four 6-32 silver-and-blue mounting screws in the adapter bracket (two on each side of the bracket). 4. Align the mounting screws on the front of the hard drive with the slots on the drive cage and press the front of the drive down and forward into the bay (1). Then press the rear of the
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    5. Connect the power cable (1) and data cable (2) to the rear of the hard drive. NOTE: If the 3.5-inch hard drive is the primary drive, connect the other end of the data cable to the dark-blue SATA connector on the system board labeled SATA0. If it is a secondary hard drive, connect the other end of
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 48
    Drive cage Rotate the drive cage to remove and install a 2.5-inch hard drive, and to access components underneath. 1. Prepare the computer for disassembly (Preparation for disassembly on page 17). 2. Remove the access panel (Access panel on page 18). 3. Rotate the drive cage to its upright position.
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    Removing a 2.5-inch hard drive 1. Prepare the computer for disassembly (Preparation for disassembly on page 17). 2. Remove the access panel (Access panel on page 18). 3. Rotate the drive cage to its upright position (Drive cage on page 40). 4. Disconnect the power cable (1) and data cable (2) from
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    19). 4. Install four black-and-blue M3 mounting screws (two on each side of the drive). NOTE: M3 metric mounting screws can be purchased from HP. When replacing a drive, transfer the four mounting screws from the old drive to the new drive. 5. Rotate the drive cage to its upright position (Drive
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    6. Align the mounting screws on the drive with the J-slots on the sides of the drive bay. Press the drive into the drive bay, and then slide the drive forward until it locks in place. 7. Connect the power cable (1) and data cable (2) to the rear of the hard drive. NOTE: If the 2.5-inch hard drive
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    Removing and installing an M.2 SSD storage card NOTE: The computer supports 2230 and 2280 M.2 SSD cards. 1. Prepare the computer for disassembly (Preparation for disassembly on page 17). 2. Remove the access panel (Access panel on page 18). 3.
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    6. To install an M.2 SSD card, slide the pins on the card into the system board connector while holding the card at approximately a 30° angle (1). Press the other end of the card down (2), and then secure the card with the screw (3). 7. Rotate the drive cage back down to its normal position (Drive
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 54
    WLAN module The WLAN module installs into a connector on the system board. For a list of available WLAN modules, see Computer major components on page 4. To remove the WLAN module: 1. Prepare the computer for disassembly (Preparation for disassembly on page 17). 2. Remove the access panel (Access
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 55
    Hood lock The hood lock is secured to the back of the computer. 1. Prepare the computer for disassembly (Preparation for disassembly on page 17). 2. Remove the access panel (Access panel on page 18). 3. Disconnect the cable from the system board connector labeled HLCK (1), and then remove the cable
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    Card reader The card reader is secured to the front of the computer behind the bezel. 1. Prepare the computer for disassembly (Preparation for disassembly on page 17). 2. Remove the access panel (Access panel on page 18). 3. Remove the front bezel (Front bezel on page 19). 4. Disconnect the cable
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    Antennas The wireless antennas are secured to both the front and back of the computer behind. 1. Prepare the computer for disassembly (Preparation for disassembly on page 17). 2. Remove the access panel (Access panel on page 18). 3. Remove the front bezel (Front bezel on page 19). 4. Disconnect the
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 58
    9. Remove the Torx T15 screw (2) that secures the antenna to the front of the chassis (2), and then pull the antenna off the chassis and the cable out of the chassis (3). To install the antennas, reverse the removal procedure. 50 Chapter 4 Removal and replacement procedures
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    Air duct The air duct sits over the fan sink. Air ducts are available for models that use up to a 65 W processor and models that use a 95 W processor. 1. Prepare the computer for disassembly (Preparation for disassembly on page 17). 2. Remove the access panel (Access panel on page 18). 3. Up to 65 W
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 60
    Option board An option board can be installed near the back of the system board that provides an additional connector on the rear I/O panel. 1. Prepare the computer for disassembly (Preparation for disassembly on page 17). 2. Remove the access panel (Access panel on page 18). 3. Remove the two
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 61
    Optional rear port The optional rear port is attached to the rear of the chassis with two screws. To remove the optional rear port: 1. Prepare the computer for disassembly (Preparation for disassembly on page 17). 2. Remove the access panel (Access panel on page 18). 3. Remove the air duct (Air duct
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 62
    Fan sink CAUTION: The bond between the fan sink and the processor may be very tight. If the computer will power on, before removing the fan sink, turn on the computer until it warms the fan sink. Warming the heat sink lessens the bond between the fan sink and the processor, thereby making separating
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 63
    5. Lift the fan sink from atop the processor (3) and set it on its side to keep from contaminating the work area with thermal grease. Up to 65 W processor models 95 W processor models Fan sink 55
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    6. Each time the heat sink is removed, apply fresh thermal grease to the top of the processor (1) and thoroughly clean the thermal grease from the bottom of the heat sink (2). Replacement thermal material is included with the fan sink and system board spare part kits. When reinstalling the fan sink,
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    Fan The fan is secured to the back of the computer. IMPORTANT: The rear fan is used only in models with a 95 W processor. 1. Prepare the computer for disassembly (Preparation for disassembly on page 17). 2. Remove the access panel (Access panel on page 18). 3. Remove the air duct (Air duct on page
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 66
    . NOTE: After installing a new processor onto the system board, always update the system ROM to ensure that the latest version of the BIOS is being used on the computer. The latest system BIOS can be found on the Web at: http://www.hp.com/support. 58 Chapter 4 Removal and replacement procedures
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    WARNING! To reduce potential safety issues, only the power supply provided with the computer, a replacement power supply provided by HP, or a power supply purchased as an accessory from HP should be used with the computer. WARNING! Voltage is always present on the system board when the computer is
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 68
    Speaker The speaker is attached to the front of the rotating drive cage. 1. Prepare the computer for disassembly (Preparation for disassembly on page 17). 2. Remove the access panel (Access panel on page 18). 3. Remove the front bezel (Front bezel on page 19). 4. Rotate the drive cage to its upright
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    System board NOTE: All system board spare part kits include replacement thermal material. NOTE: System board appearance may vary. 1. Prepare the computer for disassembly (Preparation for disassembly on page 17). 2. Remove the access panel (Access panel on page 18). 3. Remove the air duct (Air duct
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 70
    6. Disconnect the following cables from the system board: IMPORTANT: Connected cables may vary depending on system configuration. (1) Black drive power connector (SATAPWR0) (2) Hard drive connector (SATA0) (3) Optical drive connector (SATA1) (4) Speaker connector (SPKR) (5) White power supply
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    , and then align the board with the chassis screw holes. NOTE: When replacing the system board, you must change the chassis serial number in the BIOS. System board 63
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    System board callouts Sys Bd Label PWRCPU XU1 CPUFAN DIMM4 DIMM3 DIMM2 DIMM1 CMOS BAT WIRELESS SATA PWR SATA0 SATA2 SATA1 SD RDR Color Component White 4-pin processor power Silver Processor White Processor fan White Memory module Black Memory module White Memory module Black Memory
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    The Small Form Factor computer can be used in a tower orientation with an optional tower stand that can be purchased from HP. NOTE: To stabilize the computer in a tower orientation, HP recommends the use of the optional tower stand. 1. Prepare the computer for disassembly (Preparation for
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 74
    Enable or disable DriveLock security or securely erase a hard drive (when supported by drive). Using Computer Setup (F10) Utilities Computer Setup can be Utilities menu: Main, Security, Advanced, and UEFI Drivers. NOTE: Selecting UEFI Drivers restarts the computer into the 3rd party option ROM
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    menu. NOTE: Not all settings shown in the following sections are available for all models CAUTION: Do NOT turn the computer power OFF while the BIOS is saving the Computer Setup (F10) changes because the settings could become corrupted. It is safe to turn off the computer only after exiting the
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 76
    stepping ● DIMM size (for each installed module) ● Firmware System BIOS version ● ME Firmware version (Intel only) ● Video BIOS version ● Reference code version ● Super I/O Firmware version ● USB Type-C controller(s) firmware version ● Service Born on date ● Serial number ● SKU number ● UUID
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    Setup-Main (continued) Option Description ● Hardware subsystem tests ● Component tests ● Show test logs ● Language selection Update System BIOS Lets you update the system BIOS from www.hp.com or another network server, from a removable USB drive, or from a file located on the hard drive
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    Setup, and reboots. Computer Setup-Security NOTE: Support for specific Computer Setup options may vary depending on ● WMI commands that change system settings ● BIOS Configuration Utility (BCU) ● Alternative power-on password NOTE: Creating a BIOS user disables the Fast Boot option. NOTE:
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    Boot Block on every boot. Default is disabled. ● BIOS Data Recovery Policy. Default is Automatic. IMPORTANT: Only select Manual in situations in which forensic analysis is to be performed before HP Sure Start Recovery. When this policy is set to manual, HP Sure Start will not correct any issues that
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    formatted to include an MBR. Instead they use GUID Partition Table (GPT) format, which better supports large hard drives. Enabling this feature will save the control access to the MBR of the current bootable disk; the BIOS cannot prevent changes that may occur while the operating system is running
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    during a service event. Default is enabled. Restore Security Settings to Default This action resets security devices, clears BIOS passwords ( not including DriveLock), and restores settings in the Security menu to factory defaults. Computer Setup-Advanced NOTE: Support for
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 82
    Disabling this setting alters the Secure Boot key list to further restrict the allowed software components. Set this option to 'disable' to support Device Guard. System Options Turbo boost Intel Turbo Boost Technology (TBT) automatically allows processor cores to run faster than the base operating
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    Table 5-3 Computer Setup-Advanced (for advanced users) (continued) Option Heading Controls virtualization DMA remapping features of the chipset. Changing this setting requires turning the computer off and then back on. Default is disabled. PCI Express Slot x (enable/disable) Lets you disable
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    USB devices can be moved to different ports. The ports disabled by the BIOS will remain disabled until the system is restarted. Option ROM Launch Policy These policies control whether Legacy Option ROMs or UEFI drivers are loaded. Default is 'All UEFI' for Windows 10 or later. Configure Option
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    computing devices. USB Key Provisioning Support (enable/disable) Default is disabled. USB Redirection Support (enable/disable). Default is enabled for a operating system and BIOS watchdog alert to be sent if the timers are not deactivated. BIOS watchdog is deactivated by BIOS and would indicate that
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 86
    (for advanced users) (continued) Option Heading CIRA is Customer Initiated Remote Assistance, an Intel service to help users employing Active Management Technology (AMT). Computer Setup-UEFI Drivers Lets you restart the computer into the 3rd Party Option ROM Management application. You can start
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    of the drivers loaded. When booting the operating system, use "Last Known Configuration." ● Refer to the comprehensive online technical support at http://www.hp.com/support. ● Refer to Helpful hints on page 80 in this guide. To assist you in resolving problems online, HP Instant Support Professional
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    serial number before calling. ● Spend time troubleshooting the problem with the service technician. ● Remove any hardware that was problems on page 97 for instructions. ● Be sure that all the needed device drivers have been installed. For example, if you are using a printer, you need a driver
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    system, check to be sure that it is supported on the system. ● If the system has problems You may be able to easily resolve the general problems described in this section. If a problem Utility is displayed. - or - Follow the Windows instructions for rebooting the computer into the Computer Setup (F10
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    and time). If the problem persists, replace the RTC battery. See the Removal and Replacement section for instructions on installing a new you must manually disable the Smart Cover lock . A key to unlock the Smart Cover Lock is not available from HP. Keys are Troubleshooting without diagnostics
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    System unable to power on. Press and hold the power button for less than 4 seconds. If the hard drive LED turns white, then: Solving general problems 83
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    the power button assembly. 5. If the 5V_aux light on the system board is off, then replace the power supply. 6. Replace the system board. 84 Chapter 6 Troubleshooting without diagnostics
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    2. Open the access panel and ensure the power supply cable is seated into the connector on the system board. 3. Check if a device is causing the problem by removing ALL attached devices (such as hard drives or optical drives and expansion cards). Power on the system. If the system enters POST, then
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    within Computer Setup. If it is listed, the probable cause is a driver problem. If it is not listed, the probable cause is a hardware problem. If this is a newly installed drive, run the Computer Setup utility a restore kit is available, then select 86 Chapter 6 Troubleshooting without diagnostics
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    the power button for four or more seconds to turn off the power. To restart the computer, press the power button again. Solving hard drive problems 87
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    Solving media card reader problems Media card will not work media card is not inserted properly, is inserted in the wrong slot, or is not supported. Ensure that the card is inserted properly with the gold contact on the correct side. LED is flashing 88 Chapter 6 Troubleshooting without diagnostics
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 97
    F10 Computer Setup. Solving display problems If you encounter display problems, see the documentation that came set). Reflash the system ROM with the latest BIOS image. Be sure that the monitor can accept Systems may have a monitor connection on both the motherboard or an add-in card. Try moving the
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 98
    system. 2. Replace DIMMs one at a time to isolate the faulty module. 3. Replace third-party memory with HP memory. 4. Replace the system board. Blank screen and the power LED flashes Red six times, once every . Disable monitor energy saver feature. 90 Chapter 6 Troubleshooting without diagnostics
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 99
    Cause If the graphics controller was upgraded, the correct graphics drivers may not be loaded. Monitor is not capable of displaying monitor. Refer to the documentation that came with the monitor for instructions. Image is not centered. Cause Position may need adjustment. Solution problems 91
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 100
    option in the monitor's on-screen display menu. 2. Manually synchronize the Clock and Clock Phase on-screen display functions monitor, and download either SP32347 or SP32202: http://www.hp.com/support Graphics card is not seated properly or is bad (some 6 Troubleshooting without diagnostics
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    has audio features and you encounter audio problems, see the common causes and solutions listed in the following table. Headset microphone connected to the front is not working or is very quiet. Cause Solution The front Headset connector supports CTIA (Cellular Telephone Industries Association
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    driver or application software, reconfigure the jack or set the jack to its default value. There is no sound or sound volume is too low. Cause Solution The application is set to use a different audio device than speakers. Some graphics cards support Chapter 6 Troubleshooting without diagnostics
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    If you encounter printer problems, see the documentation that came with the printer and to the common causes and solutions listed in the following table. Printer will not print. Cause Printer is not turned on and online. The correct printer drivers for the application are not installed. If you
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 104
    If you encounter keyboard or mouse problems, see the documentation that came with the equipment and to the common causes and solutions listed in the following the computer. Remove the roller ball cover on the mouse and clean the internal components. 96 Chapter 6 Troubleshooting without diagnostics
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    mouse cleaning kit available from most computer stores. Solving hardware installation problems You may need to reconfigure the computer when you add or new hardware. In Windows, use the Add Hardware Wizard and follow the instructions that appear on the screen. To open the Add Hardware Wizard, open
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 106
    party memory with HP memory. 4. Replace the system board. Solving network problems Some common causes and solutions for network problems are listed in the following table. These guidelines do not discuss the process of debugging the network cabling. 98 Chapter 6 Troubleshooting without diagnostics
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    network drivers. System cannot autosense the network. Disable auto-sensing capabilities and force the system into the correct operating mode. Diagnostics reports a failure. Cause The cable is not securely connected. The cable is attached to the incorrect connector. There is a problem with
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 108
    , that a DHCP Server is present, and that the Remote System Installation Server contains the NIC drivers for your NIC. System setup utility reports unprogrammed EEPROM. Cause Unprogrammed EEPROM. Solution Contact an authorized service provider. 100 Chapter 6 Troubleshooting without diagnostics
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 109
    If you encounter memory problems, some common causes and solutions are listed in the before attempting to reseat, install, or remove a memory module. For those systems that support ECC memory, HP does not support mixing ECC and non-ECC memory. Otherwise, the computer will not boot the operating
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    with HP memory. 4. Replace the system board. Solving CD-ROM and DVD problems If you encounter CD-ROM or DVD problems, see listed, the probable cause is a driver problem. If it is not listed, the probable cause is a hardware problem. If this is a newly installed Troubleshooting without diagnostics
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    CD-ROM or DVD devices are not detected or driver is not loaded. Cause Solution Drive is not connected properly or not properly configured. See the Manager from the list of applications. 2. Restart the computer and let Windows detect the CD or DVD driver. Solving CD-ROM and DVD problems 103
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    of media. Quality varies widely between manufacturers. Solving USB flash drive problems If you encounter USB flash drive problems, common causes and solutions are listed in the following table. USB flash defective. Try a different flash drive. 104 Chapter 6 Troubleshooting without diagnostics
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 113
    end is connected to a live outlet. The correct device driver is not installed. 1. Install the correct driver for the device. 2. You might need to reboot the Security. Solving Internet access problems If you encounter Internet access problems, consult your Internet Service Provider (ISP) or refer
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    drivers have been installed. ● If you have installed an operating system other than the factory-installed operating system, check to be sure it is supported on the system. If you encounter software problems all programs, and restart the computer. 106 Chapter 6 Troubleshooting without diagnostics
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 115
    -Test (POST) or computer restart, the probable source of the problem, and steps you can take to resolve the error condition. POST messages. If a POST error occurs, the screen will display the error message. To manually switch to the POST Messages Enabled mode during POST, press any key (except F10
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    RTC (real-time clock) battery may need to be replaced. problem persists, replace the RTC battery. See the Removal and Replacement section for instructions on installing a new battery. Processor is not supported by the BIOS. 1. Upgrade BIOS to proper version. 2. Change the processor. Memory error
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 117
    . 2. If the error persists, update to the latest BIOS version. 3. If the error still persists, replace the , remove it to see if the problem remains. Check product documentation for memory support information. DIMM1 is not installed. Make hp.com/support.) POST numeric codes and text messages 109
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 118
    Protection System test under using F2 Diagnostics when booting the computer. 2. Apply hard drive firmware patch if applicable. (Available at http://www.hp.com/support.) 3. Back up contents and replace hard drive. Hard drive is about to fail. (Some hard drives 1. have a hard drive firmware patch
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 119
    There is an incompatibility or problem with a PCIe device and BIOS recovery has occurred. Not applicable. 70x-Wireless Mode Not Supported The system has detected a wireless module installed in the system that is not supported and has been disabled. Replace with a supported module. 800
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 120
    system has detected that a cooling fan is not operating correctly. 1. Reseat fan. 2. Reseat fan cable. 3. Replace fan. Thermal shutdown occurred. The system BIOS has detected your machine was previously shut down to avoid overheating. Overheating may occur if the cooling vents are blocked or the
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 121
    3.3 The embedded controller has timed out waiting for BIOS to return from graphics initialization. 3.4 The system board displays a power failure (crowbar).* 3.5 The processor is not detected.* 3.6 The processor does not support an enabled feature. Thermal 4.2 A processor over temperature
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 122
    when in stringent security mode, the system can only be reset by System Management Command. This is a way for HP Service and Support to provide a secure method to access the BIOS and command a password reset for a specifically identified unit under the direction of the owner. This scenario may not
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 123
    beginning these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal object. See the Safety & Regulatory Information guide for more information. 3. Remove the access panel. 4. Locate the header and jumper. NOTE: The password jumper is green so that it
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 124
    the BIOS The CMOS button resets BIOS settings to a grounded metal object. See the Safety & Regulatory Information guide for more information. 3. Remove the access panel. CAUTION: system setups along with the date and time. For instructions on Computer Setup, see Computer Setup (F10) Utility on
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 125
    Failure ID code is generated. For assistance in correcting the problem, contact support, and then provide the Failure ID code. Downloading HP PC Hardware Diagnostics Windows ● The HP PC Hardware Diagnostics Windows download instructions are provided in English only. ● You must use a Windows computer
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 126
    Go to http://www.hp.com/support. 2. Select Get software and drivers, and then enter the product name or number. 3. In the HP PC Hardware Diagnostics file, and then follow the on-screen instructions. Using HP PC Hardware Diagnostics UEFI HP PC Hardware Diagnostics UEFI (Unified Extensible Firmware
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 127
    Diagnostics UEFI is not included in the HP Tool partition. ● The hard drive is damaged. NOTE: The HP PC Hardware Diagnostics UEFI download instructions are provided in English only, and you must use a Windows computer to download and create the HP UEFI support environment because only .exe files are
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 128
    Remote HP PC Hardware Diagnostics UEFI is a firmware (BIOS) feature that downloads HP PC hp.com/support. 2. Select Get software and drivers, enter the product name or number, select your computer, and then select your operating system. 3. In the Diagnostics section, follow the on-screen instructions
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 129
    3. Make your customization selections. 4. Select Main, and then Save Changes and Exit to save your settings. Your changes take effect when the computer restarts. Using Remote HP PC Hardware Diagnostics UEFI settings (select products only) 121
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 130
    , or dispose of in fire or water. Replace the battery only with the HP spare designated for this product. CAUTION: Before replacing the battery, it is important holder on the system board, complete the following instructions to replace the battery. Type 1 a. Lift the battery out of its
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 131
    b. Slide the replacement battery into position, positive side up. The battery holder automatically secures the battery in the proper position. Type 2 a. To release the battery from its holder, squeeze the metal clamp that extends above one edge of the battery. When the battery pops up, lift it out
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 132
    b. Insert the new battery and position the clip back into place. NOTE: After the battery has been replaced, use the following steps to complete this procedure. 8. Replace the computer access panel. 9. Plug in the computer and turn on power to the computer. 10. Reset the date and time, your passwords
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 133
    B Power cord set requirements The power supplies on some computers have external power switches. The voltage select switch feature on the computer permits it to operate from any line voltage between 100-120 or 220-240 volts AC. Power supplies on those computers that do not have external power
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 134
    Country-Specific Requirements Additional requirements specific to a country are shown in parentheses and explained below. Country Accrediting Agency Country Accrediting Agency Australia (1) EANSW Italy (1) IMQ Austria (1) OVE Japan (3) METI Belgium (1) CEBC Norway (1) NEMKO Canada
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 135
    regarding nonvolatile memory in HP Business computers. This chapter also provides general instructions for restoring nonvolatile memory is displayed at the bottom of the screen. NOTE: If the system has a BIOS administrator password, enter the password at the prompt. f. If an asset or ownership
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 136
    Menu" message is displayed at the bottom of the screen. NOTE: If the system has a BIOS administrator password, enter the password at the prompt. j. Select the Main menu, select Apply Factory clear, and then follow the on-screen instructions to continue. 128 Appendix C Statement of memory volatility
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 137
    managed Embedded Controller. critical System solely by the HP Sure Start BIOS code, EC Embedded Controller. firmware, and critical computer configuration data for select platforms that support HP Sure Start. For more information, see Using HP Sure Start (select models only) on page 132
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 138
    For more information, go to http://www.hp.com/ support. Select Find your product, and then follow the onscreen instructions.) Bluetooth flash 2 Mbit No (select through newer available but can be obtained versions of the driver from the silicon vendor. whenever the flash requires an upgrade
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 139
    on-screen instructions. 2. What is a UEFI BIOS, and how is it different from a legacy BIOS? The Unified Extensible Firmware Interface (UEFI) BIOS is for the older BIOS architecture, but supports much of the legacy BIOS functionality. Like the legacy BIOS, the UEFI BIOS provides an interface
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 140
    HP Sure Start, a technology that continuously monitors your computer's BIOS for attacks or corruption. If the BIOS becomes corrupted or is attacked, HP Sure Start restores the BIOS on HP Sure Start, go to http://www.hp.com/support. Select Find your product, and then follow the on-screen instructions.
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 141
    D Specifications Item Dimensions Width Depth Height Weight Max supported weight (desktop orientation) Temperature range Operating Non-operating Relative Humidity (at max inlet temperature) Operating Non-operating Maximum altitude Operating Non-operating Power supply 80
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 142
    problems 93 B battery disposal 14 battery replacement 122 beep codes 112 BIOS problem 81 country power cord set requirements 126 Customer Support 79 HP PC Hardware Diagnostics UEFI downloading 119 starting 119 using 118 HP PC Hardware Diagnostics Windows downloading 117 installing 118 using 117 HP
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 143
    illustrated 5 product ID location 3 R rear panel components 3 Remote HP PC Hardware Diagnostics UEFI settings customizing 120 using 120 removal and replacement air correct size 13 serial number location 3 service considerations 13 software problems 106 servicing computer 13 solid-state drives sizes
  • HP EliteDesk 800 G4 | Maintenance and Service Guide - Page 144
    T temperature control 11 tools, servicing 13 Torx T15 screwdriver 13 tower orientation 65 V ventilation, proper 11 W wireless antennas disconnecting 46 WLAN module removal 46 spare part number 46 136 Index
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Maintenance and Service Guide
HP EliteDesk 800 G4 SFF Business PC