HP EliteDesk 800 G3, ProDesk 600 G3, ProDesk 400 G3 Maintenance and Service Guide

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Maintenance and Service Guide

HP EliteDesk 800 G3 Desktop Mini HP ProDesk 600 G3 Desktop Mini HP ProDesk 400 G3 Desktop Mini

L.P.

Bluetooth is a trademark owned by its proprietor and used by HP Inc. under license. Intel, Celeron, and Pentium are trademarks of Intel Corporation in the U.S. and other countries. Microsoft and Windows are trademarks of the Microsoft group of companies.

The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.

First Edition (January 2017)

Document Part Number: 913328-001

Product notices

This user guide describes features that are common to most models. Some features may not be available on your computer.

This guide describes features that are common to most models. Some features may not be available on your computer.

In accordance with Microsoft’s support policy, HP does not support the Windows® 8 or Windows 7 operating system on products con gured with Intel and AMD 7th generation and forward processors or provide any Windows 8 or Windows 7 drivers on http://www.support.hp.com.

Not all features are available in all editions of Windows. This computer may require upgraded and/or separately purchased hardware, drivers and/or software to take full advantage of Windows functionality. Go to http://www.microsoft.com for details.

Software terms

By installing, copying, downloading, or otherwise using any software product preinstalled on this computer, you agree to be bound by the terms of the HP End User License Agreement (EULA). If you do not accept these license terms, your sole remedy is to return the entire unused product (hardware and software) within 14 days for a full refund subject to the refund policy of your seller.

For any further information or to request a full refund of the price of the computer, please contact your seller.

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. Also, do not allow the AC adapter to contact the skin or a soft surface, such as pillows or rugs or clothing, during operation. The device and the AC adapter comply with the user-accessible surface temperature limits de ned by the International Standard for Safety of Information Technology Equipment (IEC 60950-1).

iii

iv Safety warning notice

Table of contents

1 Product features ...........................................................................................................................................	1
Standard con guration features ...........................................................................................................................	1
Front panel components (EliteDesk 800 and ProDesk 600) .................................................................................	1
Front panel components (ProDesk 400) ...............................................................................................................	2
Rear panel components (EliteDesk 800, and ProDesk 600) .................................................................................	3
Rear panel components (ProDesk 400) .................................................................................................................	4
Serial number location ..........................................................................................................................................	5
2 Illustrated parts catalog ................................................................................................................................	6
Desktop Mini (DM) chassis spare parts ..................................................................................................................	6
Computer major components .............................................................................................................	6
Cables ..................................................................................................................................................	8
Misc parts .............................................................................................................................................	9
Drives .................................................................................................................................................	11
3 Routine care, SATA drive guidelines, and disassembly preparation ..................................................................	12
Electrostatic discharge information ....................................................................................................................	12
Generating static ...............................................................................................................................	12
Preventing electrostatic damage to equipment ...............................................................................	13
Personal grounding methods and equipment ..................................................................................	13
Grounding the work area ...................................................................................................................	13
Recommended materials and equipment ........................................................................................	14
Operating guidelines ...........................................................................................................................................	14
Routine care .........................................................................................................................................................	15
General cleaning safety precautions ................................................................................................	15
Cleaning the Computer Case .............................................................................................................	15
Cleaning the keyboard .......................................................................................................................	15
Cleaning the monitor .........................................................................................................................	16
Cleaning the mouse ...........................................................................................................................	16
Service considerations .........................................................................................................................................	16
Tools and software Requirements ....................................................................................................	16
Screws ...............................................................................................................................................	16
Cables and connectors ......................................................................................................................	17
Hard Drives ........................................................................................................................................	17
Lithium coin cell battery ....................................................................................................................	17
SATA hard drives ..................................................................................................................................................	18

SATA hard drive cables .........................................................................................................................................	18
SATA data cable .................................................................................................................................	18
SMART ATA drives ................................................................................................................................................	18
Cable management ..............................................................................................................................................	19
4 Removal and replacement procedures – desktop mini (DM) chassis ..................................................................	20
Preparation for disassembly ...............................................................................................................................	20
Top cover ..............................................................................................................................................................	21
Front bezel ...........................................................................................................................................................	22
Front bezel dust lter ..........................................................................................................................................	23
Thermal sensor ....................................................................................................................................................	24
Memory ................................................................................................................................................................	25
SODIMMs ............................................................................................................................................	25
SODIMM speci cations ......................................................................................................................	25
Populating SODIMM sockets .............................................................................................................	26
Replacing SODIMMs ...........................................................................................................................	27
Hard drive .............................................................................................................................................................	29
Hard drive cable ...................................................................................................................................................	31
Secondary fan (EliteDesk 800 G3 65 W models only) .........................................................................................	32
Drive cage ............................................................................................................................................................	33
M.2 PCIe solid state drive (SSD) ...........................................................................................................................	34
WLAN module ......................................................................................................................................................	36
External antenna .................................................................................................................................................	38
RTC battery ..........................................................................................................................................................	40
Fan ........................................................................................................................................................................	42
Heat sink ..............................................................................................................................................................	43
Processor .............................................................................................................................................................	46
Speaker ................................................................................................................................................................	48
Option board ........................................................................................................................................................	49
System board .......................................................................................................................................................	50
System board callouts .......................................................................................................................	52
Internal WLAN antenna cable removal/installation ............................................................................................	53
Changing from desktop to tower con guration ..................................................................................................	56
5 Computer Setup (F10) Utility ........................................................................................................................	57
Computer Setup (F10) Utilities ............................................................................................................................	57
Using Computer Setup (F10) Utilities ................................................................................................	57
Computer Setup–Main .......................................................................................................................	59
Computer Setup—Security ...............................................................................................................	61
Computer Setup—Advanced .............................................................................................................	63
Computer Setup—UEFI Drivers .........................................................................................................	68

Recovering the Con guration Settings ...............................................................................................................	68
6 Troubleshooting without diagnostics ............................................................................................................	69
Safety and comfort ..............................................................................................................................................	69
Before you call for technical support ..................................................................................................................	69
Helpful hints ........................................................................................................................................................	70
Solving general problems ....................................................................................................................................	71
Solving power problems ......................................................................................................................................	75
Solving hard drive problems ................................................................................................................................	76
Solving media card reader problems ...................................................................................................................	78
Solving display problems ....................................................................................................................................	79
Solving audio problems .......................................................................................................................................	83
Solving printer problems .....................................................................................................................................	85
Solving keyboard and mouse problems ..............................................................................................................	86
Solving hardware installation problems .............................................................................................................	87
Solving network problems ..................................................................................................................................	89
Solving memory problems ..................................................................................................................................	92
Solving USB flash drive problems ........................................................................................................................	93
Solving front panel component problems ..........................................................................................................	94
Solving Internet access problems .......................................................................................................................	94
Solving software problems ..................................................................................................................................	96
7 POST error messages and diagnostic front panel LEDs and audible codes .........................................................	97
POST numeric codes and text messages .............................................................................................................	97
Interpreting system validation diagnostic front panel LEDs and audible codes ..............................................	102
8 Password security and resetting CMOS ........................................................................................................	104
Resetting the password jumper ........................................................................................................................	104
Clearing and resetting the BIOS ........................................................................................................................	106
9 Using HP PC Hardware Diagnostics (UEFI) .....................................................................................................	107
Downloading HP PC Hardware Diagnostics (UEFI) to a USB device ..................................................................	107
10 System backup and recovery .....................................................................................................................	109
Backing up, restoring, and recovering in Windows 7 ........................................................................................	109
Creating recovery media .................................................................................................................	109
Creating recovery media using HP Recovery Manager (select models only) ...............	110
Creating recovery discs with HP Recovery Disc Creator (select models only) .............	111
Creating recovery discs ..............................................................................	111
Backing up your information ........................................................................................	111

vii

System Restore ...............................................................................................................................	112
System Recovery .............................................................................................................................	112
System Recovery when Windows is responding ..........................................................	113
System Recovery when Windows is not responding ....................................................	113
System Recovery using recovery media (select models only) .....................................	114
Using HP Recovery Disc operating system discs (select models only) ........................	114
Backing up, restoring, and recovering in Windows 10 ......................................................................................	115
Creating recovery media and backups ............................................................................................	115
Creating HP Recovery media (select products only) ....................................................	116
Using Windows tools .......................................................................................................................	117
Restore and recovery ......................................................................................................................	117
Recovering using HP Recovery Manager ......................................................................	118
What you need to know before you get started ........................................	118
Using the HP Recovery partition (select products only) ............................	118
Using HP Recovery media to recover .........................................................	119
Changing the computer boot order ............................................................	119
Removing the HP Recovery partition (select products only) .....................	119
Appendix A Power Cord Set Requirements ......................................................................................................	120
General Requirements .......................................................................................................................................	120
Japanese Power Cord Requirements .................................................................................................................	120
Country-Speci c Requirements ........................................................................................................................	121
Appendix B Statement of memory volatility ...................................................................................................	122
Nonvolatile memory usage ...............................................................................................................................	124
Questions and answers .....................................................................................................................................	126
Using HP Sure Start (select models only) ..........................................................................................................	127
Appendix C peci c tions .............................................................................................................................	128
Index ...........................................................................................................................................................	129

viii

1Product features

Standard con gur tion features

Features may vary depending on the model. For a complete listing of the hardware and software installed in the computer, run the diagnostic utility (included on some computer models only).

NOTE: This computer model can be used in a tower orientation or a desktop orientation. The tower stand is sold separately.

Front panel components (EliteDesk 800 and ProDesk 600)

NOTE: Your computer model may look slightly di erent from the illustration in this section.

Item Icon	Component	Item	Icon	Component

1	USB Type-C SuperSpeed port with HP Sleep and	5		Audio-out (headset)/Audio-in (microphone)
	Charge*			combo jack

2	USB 3.x port	6		Drive light

3	USB 3.x port with HP Sleep and Charge*	7		Dual-state power button

4	Headphone jack

*When the computer is on, the USB port connects a USB device, provides high-speed data transfer, and even when the computer is o , charges products such as a cell phone, camera, activity tracker, or smartwatch.

NOTE: The drive light is normally white when the power is on. If it is flashing red, there is a problem with the computer and the drive light is displaying a diagnostic code. Refer to the Maintenance and Service Guide to interpret the code.

Standard con guration features

Front panel components (ProDesk 400)

NOTE: Your computer model may look slightly di erent from the illustration in this section.

Item Icon	Component	Item Icon	Component

1	USB 3.x port	4	Audio-out (headset)/Audio-in (microphone)
			combo jack

2	USB 3.x port with HP Sleep and Charge*	5	Drive light

3	Headphone jack	6	Dual-state power button

2Chapter 1 Product features

Rear panel components (EliteDesk 800, and ProDesk 600)

NOTE: Your computer model may look slightly di erent from the illustration in this section.

Item Icon	Component	Item Icon	Component

1	Antenna cover	7	Optional port (DisplayPort, HDMI, VGA, Serial
			or USB-CTM) (USB-CTM option has alt mode
			DisplayPort or 15W output)
			NOTE: The DisplayPort is optional and may
			be replaced with one of the following ports:
			HDMI, VGA, USB Type-C alternate mode, or
			serial port.

2	Cover lock switch	8	USB 3.x ports (2) (black)

3	Security cable slot	9	USB 3.x ports (2) (black)*

4	External antenna connector	10	RJ-45 (network) jack

5	Padlock loop	11	Power connector

6	Dual-Mode DisplayPort (D++) (2)

*These USB ports allow for wake from S4/S5 hibernation system power states using the keyboard or mouse when enabled in BIOS.

Rear panel components (EliteDesk 800, and ProDesk 600)

Rear panel components (ProDesk 400)

NOTE: Your computer model may look slightly di erent from the illustration in this section.

Item Icon	Component	Item Icon	Component

1	Antenna cover	7	Serial port (black)

2	Thumbscrew	8	DisplayPort (optional)
			NOTE: The DisplayPort is optional and
			may be replaced with one of the following
			ports: HDMI, VGA, or serial port.

3	Security cable slot	9	USB 3.x ports (2) (black)*

4	External antenna connector	10	USB 2.0 ports (2) (black)

5	Padlock loop	11	RJ-45 (network) jack

6	Dual-Mode DisplayPort (D++)	12	Power connector

*These USB ports allow for wake from S4/S5 hibernation system power states using the keyboard or mouse when enabled in BIOS.

4Chapter 1 Product features

Serial number location

Each computer has a unique serial number and a product ID number that are located on the exterior of the computer. Keep these numbers available for use when contacting support for assistance.

Serial number location

HP EliteDesk 800 G3, ProDesk 600 G3, ProDesk 400 G3 Maintenance and Service Guide

2Illustrated parts catalog

Desktop Mini (DM) chassis spare parts

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.

Computer major components

Item Description

Front bezel

(1)HP ProDesk 400 G3 models

(2)HP ProDesk 600 G3 models

(3)HP EliteDesk 800 G3 models

(4)System board (includes replacement thermal material)

(5)External power supply, 90W

6Chapter 2 Illustrated parts catalog

Item Description

90 W

65 W

(6)Memory modules (DDR4-2400) 16-GB

8-GB

4-GB

*Intel Processors (800, 600, 400 models; include replacement thermal material) Intel Core i7-7700, 65 W (800 G3 models only)

Intel Core i7-7700T Intel Core i5-7600T

Intel Core i5-7500, 65 W (800 G3 models only) Intel Core i5-7500T

Intel Core i3-7320, 65 W (800 G3 models only) Intel Core i3-7300, 65 W (800 G3 models only) Intel Core i3-7300T

Intel Core i3-7100, 65 W (800 G3 models only) Intel Core i3-7100T

Intel Core i7-6700, 65 W (800 G3 models only) Intel Core i7-6700T

Intel Core i5-6600, 65 W (800 G3 models only) Intel Core i5-6600T

Intel Core i5-6500, 65 W (800 G3 models only) Intel Core i7-6500T

Intel Core i3-6100, 65 W (800 G3 models only) Intel Core i3-6100T

Intel Pentium G4620, 65 W (800 G3 models only) Intel Pentium G4600, 65 W (800 G3 models only) Intel Pentium G4600T

Intel Pentium G4560, 65 W (800 G3 models only) Intel Pentium G4560T

Intel Pentium G3950, 65 W (800 G3 models only) Intel Celeron G3930, 65 W (800 G3 models only) Intel Celeron G3930T

* not illustrated

Desktop Mini (DM) chassis spare parts

Cables

Item Description

(1)SATA cable

*Adapter, DisplayPort to HDMI 1.4

*Adapter, DisplayPort to VGA

*Adapter, DisplayPort to DVI

*Adapter, USB-C to USB 3.0

*Adapter, USB-C to VGA

*Adapter, USB-C to DisplayPort

*Adapter, USB-C to HDMI

*DVI cable

*DisplayPort cable

* not illustrated

8Chapter 2 Illustrated parts catalog

Misc parts

Item	Description

(1)	Fan

	For use with 65 W processors (800 G3 models only)

	For use with 35 W processors

(2)	Secondary hard drive fan (for use in EliteDesk 800 G3 65W models)

(3)	Heat sink

	For use with 65 W processors (800 G3 models only)

	For use with 35 W processors

(4)	Speaker

(5)	Thermal sensor

(6)	Option board, HDMI

(7)	Option board, serial port

(8)	Fan duct

*	Option board, DisplayPort (not illustrated)
	Option board, DisplayPort (not illustrated)

Desktop Mini (DM) chassis spare parts

Item Description

Option board, USB Type-C (not illustrated)

Option board, VGA (not illustrated)

Screw kit

Stand

Port cover

Dust lter

*EPS bracket

*HP Dual Head Keyed Cable Lock

*Grommet, hard drive

*WLAN modules:

Intel 8265 802.11AC 2x2 Wi-Fi +Bluetooth M.2 Combo Card non-VPro Intel 7265 802.11AC 2x2 Wi-Fi +Bluetooth M.2 Combo Card non-VPro Intel 3168 802.11AC 2x2 Wi-Fi +Bluetooth M.2 Combo Card non-VPro

*Internal antenna kit

*External antenna kit

*Antenna cover, internal

*WLAN wiring kit

*Expansion Sleeve Kit

Hard drive – I/O I/O

Optical drive USB 3.0 Type A-B

USB 3.0 Type A-B (short)

*Dual VESA Sleeve

*Mouse

USB, laser USB, optical USB, grey Wireless Antimicrobial Hardened

*Keyboards

USB slim

10 Chapter 2 Illustrated parts catalog

Item Description

USB slim, grey

Wireless keyboard, mouse, and receiver

Washable

USB Smart card

Conferencing

Antimicrobial

*not illustrated

Drives

Description

Hard drives, 2.5-inch

2 TB, 5400 rpm

1 TB, 7200 rpm

1 TB, 5400 rpm, SSHD (hybrid SSD)

500 GB, 7200 rpm

500 GB, 5400 rpm, SSHD (hybrid SSD)

500 GB, 7200 rpm, OPAL 2, SED

500 GB, 5400 rpm, FIPS-140-2, OPAL 2

Solid-state drives, 2.5-inch

512 GB, FIPS-140-2

256 GB, FIPS-140-2

256 GB

128 GB

Desktop Mini (DM) chassis spare parts 11

3Routine care, SATA drive guidelines, and disassembly preparation

This chapter provides general service information for the computer. Adherence to the procedures and precautions described in this chapter is essential for proper service.

CAUTION: When the computer is plugged into an AC power source, voltage is always applied to the system board. You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

Electrostatic discharge information

A sudden discharge of static electricity from your nger or other conductor can destroy static-sensitive devices or microcircuitry. Often the spark is neither felt nor heard, but damage occurs. An electronic device exposed to electrostatic discharge (ESD) may not appear to be a ected at all and can work perfectly throughout a normal cycle. The device may function normally for a while, but it has been degraded in the internal layers, reducing its life expectancy.

Networks built into many integrated circuits provide some protection, but in many cases, the discharge contains enough power to alter device parameters or melt silicon junctions.

Generating static

The following table shows that:

● Di erent activities generate di erent amounts of static electricity.

●Static electricity increases as humidity decreases.

	Relative Humidity

Event	55%	40%	10%

Walking across carpet	7,500 V	15,000 V	35,000 V
Walking across vinyl floor	3,000 V	5,000 V	12,000 V
Motions of bench worker	400 V	800 V	6,000 V
Removing DIPs from plastic tube	400 V	700 V	2,000 V

Removing DIPs from vinyl tray	2,000 V	4,000 V	11,500 V
Removing DIPs from Styrofoam	3,500 V	5,000 V	14,500 V
Removing bubble pack from PCB	7,000 V	20,000 V	26,500 V
Packing PCBs in foam-lined box	5,000 V	11,000 V	21,000 V

These are then multi-packaged inside plastic tubes, trays, or Styrofoam.

NOTE: 700 volts can degrade a product.

12 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation

Preventing electrostatic damage to equipment

Many electronic components are sensitive to ESD. Circuitry design and structure determine the degree of sensitivity. The following packaging and grounding precautions are necessary to prevent damage to electric components and accessories.

●To avoid hand contact, transport products in static-safe containers such as tubes, bags, or boxes.

●Protect all electrostatic parts and assemblies with conductive or approved containers or packaging.

●Keep electrostatic sensitive parts in their containers until they arrive at static-free stations.

●Place items on a grounded surface before removing them from their container.

●Always be properly grounded when touching a sensitive component or assembly.

●Avoid contact with pins, leads, or circuitry.

●Place reusable electrostatic-sensitive parts from assemblies in protective packaging or conductive foam.

Personal grounding methods and equipment

Use the following equipment to prevent static electricity damage to equipment:

●Wrist straps are flexible straps with a maximum of one-megohm ± 10% resistance in the ground cords. To provide proper ground, a strap must be worn snug against bare skin. The ground cord must be

connected and t snugly into the banana plug connector on the grounding mat or workstation.

●Heel straps/Toe straps/Boot straps can be used at standing workstations and are compatible with most types of shoes or boots. On conductive floors or dissipative floor mats, use them on both feet with a maximum of one-megohm ± 10% resistance between the operator and ground.

Static Shielding Protection Levels

Method	Voltage

Antistatic plastic	1,500
Carbon-loaded plastic	7,500
Metallized laminate	15,000

Grounding the work area

To prevent static damage at the work area, use the following precautions:

●Cover the work surface with approved static-dissipative material. Provide a wrist strap connected to the work surface and properly grounded tools and equipment.

●Use static-dissipative mats, foot straps, or air ionizers to give added protection.

●Handle electrostatic sensitive components, parts, and assemblies by the case or PCB laminate. Handle them only at static-free work areas.

●Turn o power and input signals before inserting and removing connectors or test equipment.

● Use xtures made of static-safe materials when xtures must directly contact dissipative surfaces.

●Keep work area free of nonconductive materials such as ordinary plastic assembly aids and Styrofoam.

●	Use eld service tools, such as cutters, screwdrivers, and vacuums, that are conductive.

Electrostatic discharge information 13

Recommended materials and equipment

Materials and equipment that are recommended for use in preventing static electricity include:

●Antistatic tape

●Antistatic smocks, aprons, or sleeve protectors

●Conductive bins and other assembly or soldering aids

●Conductive foam

●Conductive tabletop workstations 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

●Conductive plastic tubes

●Conductive tote boxes

●Opaque shielding bags

●Transparent metallized shielding bags

●Transparent shielding tubes

Operating guidelines

To prevent overheating and to help prolong the life of the computer:

●Keep the computer away from excessive moisture, direct sunlight, and extremes of heat and cold.

●Operate the computer on a sturdy, level surface. Leave a 10.2-cm (4-inch) clearance on all vented sides of the computer and above the monitor to permit the required airflow.

●Never restrict the airflow into the computer by blocking any vents or air intakes. Do not place the keyboard, with the keyboard feet down, directly against the front of the desktop unit as this also restricts airflow.

●Occasionally clean the air vents on all vented sides of the computer. Lint, dust, and other foreign matter can block the vents and limit the airflow. Be sure to unplug the computer before cleaning the air vents.

●Never operate the computer with the cover or side panel removed.

●Do not stack computers on top of each other or place computers so near each other that they are subject to each other’s re-circulated or preheated air.

●If the computer is to be operated within a separate enclosure, intake and exhaust ventilation must be provided on the enclosure, and the same operating guidelines listed above will still apply.

●Keep liquids away from the computer and keyboard.

14 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation

●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 computer.

2.Never immerse any parts in water or cleaning solutions; apply any liquids to a clean cloth and then use the cloth on the component.

3.Always unplug the computer when cleaning with liquids or damp cloths.

4.Always unplug the computer before cleaning the keyboard, mouse, or air vents.

5.Disconnect the keyboard before cleaning it.

6.Wear safety glasses equipped with side shields when cleaning the keyboard.

Cleaning the Computer Case

Follow all safety precautions in General cleaning safety precautions on page 15 before cleaning the computer.

To clean the computer case, follow the procedures described below:

●To remove light stains or dirt, use plain water with a clean, lint-free cloth or swab.

●For stronger stains, use a mild dishwashing liquid diluted with water. Rinse well by wiping it with a cloth or swab dampened with clear water.

●For stubborn stains, use isopropyl (rubbing) alcohol. No rinsing is needed as the alcohol will evaporate quickly and not leave a residue.

●After cleaning, always wipe the unit with a clean, lint-free cloth.

●Occasionally clean the air vents on the computer. Lint and other foreign matter can block the vents and limit the airflow.

Cleaning the keyboard

Follow all safety precautions in General cleaning safety precautions on page 15 before cleaning the keyboard.

To clean the tops of the keys or the keyboard body, follow the procedures described in Cleaning the Computer Case on page 15.

When cleaning debris from under the keys, review all rules in General cleaning safety precautions on page 15 before following these procedures:

CAUTION: Use safety glasses equipped with side shields before attempting to clean debris from under the keys.

●Visible debris underneath or between the keys may be removed by vacuuming or shaking.

●Canned, pressurized air may be used to clean debris from under the keys. Caution should be used as too much air pressure can dislodge lubricants applied under the wide keys.

Routine care 15

●If you remove a key, use a specially designed key puller to prevent damage to the keys. This tool is available through many electronic supply outlets.

CAUTION: Never remove a wide leveled key (like the space bar) from the keyboard. If these keys are improperly removed or installed, the keyboard may not function properly.

●Cleaning under a key may be done with a swab moistened with isopropyl alcohol and squeezed out. Be careful not to wipe away lubricants necessary for proper key functions. Use tweezers to remove any

bers or dirt in con ned areas. Allow the parts to air dry before reassembly.

Cleaning the monitor

●Wipe the monitor screen with a clean cloth moistened with water or with a towelette designed for cleaning monitors. Do not use sprays or aerosols directly on the screen; the liquid may seep into the housing and damage a component. Never use solvents or flammable liquids on the monitor.

●To clean the monitor body follow the procedures in Cleaning the Computer Case on page 15.

Cleaning the mouse

Before cleaning the mouse, ensure that the power to the computer is turned o .

●	Clean the mouse ball by rst removing the retaining plate and the ball from the housing. Pull out any
	debris from the ball socket and wipe the ball with a clean, dry cloth before reassembly.

●To clean the mouse body, follow the procedures in Cleaning the Computer Case on page 15.

Service considerations

Listed below are some of the considerations that you should keep in mind during the disassembly and assembly of the computer.

Tools and software Requirements

To service the computer, you need the following:

●Torx T-15 screwdriver

●Torx T-15 screwdriver with small diameter shank (for certain front bezel removal)

●Flat-bladed screwdriver (may sometimes be used in place of the Torx screwdriver)

●Phillips #2 screwdriver

●Diagnostics software

●Tamper-resistant T-15 wrench

Screws

The screws used in the computer are not interchangeable. They may have standard or metric threads and may be of di erent lengths. If an incorrect screw is used during the reassembly process, it can damage the unit. HP strongly recommends that all screws removed during disassembly be kept with the part that was removed, then returned to their proper locations.

CAUTION: Metric screws have a black nish. U.S. screws have a silver nish and are used on hard drives only.

CAUTION: As each subassembly is removed from the computer, it should be placed away from the work area to prevent damage.

16 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation

Cables and connectors

Most cables used throughout the unit are flat, flexible cables. These cables must be handled with care to avoid damage. Apply only the tension required to seat or unseat the cables during insertion or removal from the connector. Handle cables by the connector whenever possible. In all cases, avoid bending or twisting the cables, and ensure that the cables are routed in such a way that they cannot be caught or snagged by parts being removed or replaced.

CAUTION: When servicing this computer, ensure that cables are placed in their proper location during the reassembly process. Improper cable placement can damage the computer.

Hard Drives

Handle hard drives as delicate, precision components, avoiding all physical shock and vibration. This applies to failed drives as well as replacement spares.

●If a drive must be mailed, place the drive in a bubble-pack mailer or other suitable protective packaging and label the package “Fragile: Handle With Care.”

●Do not remove hard drives from the shipping package for storage. Keep hard drives in their protective packaging until they are actually mounted in the computer.

●Avoid dropping drives from any height onto any surface.

●	If you are inserting or removing a hard drive, turn o the computer. Do not remove a hard drive while the
	computer is on or in standby mode.

●Before handling a drive, ensure that you are discharged of static electricity. While handling a drive, avoid touching the connector.

●Do not use excessive force when inserting a drive.

●	Avoid exposing a hard drive to liquids, temperature extremes, or products that have magnetic elds
	such as monitors or speakers.

Lithium coin cell battery

The battery that comes with the computer provides power to the real-time clock and has a minimum lifetime of about three years.

See the appropriate removal and replacement chapter for the chassis you are working on in this guide for instructions on the replacement procedures.

WARNING! This computer contains a lithium battery. There is a risk of re and chemical burn if the battery is handled improperly. Do not disassemble, crush, puncture, short external contacts, dispose in water or re, or expose it to temperatures higher than 140ºF (60ºC). Do not attempt to recharge the battery.

NOTE: Batteries, battery packs, and accumulators should not be disposed of together with the general household waste. In order to forward them to recycling or proper disposal, please use the public collection system or return them to HP, their authorized partners, or their agents.

Service considerations

SATA hard drives

Serial ATA Hard Drive Characteristics

Number of pins/conductors in data cable	7/7

Number of pins in power cable	15

Maximum data cable length	39.37 in (100 cm)

Data interface voltage di erential	400-700 mV

Drive voltages	3.3 V, 5 V, 12 V

Jumpers for con guring drive	N/A

Data transfer rate	6.0 Gb/s

SATA hard drive cables

SATA data cable

Always use an HP approved SATA 6.0 Gb/s cable as it is fully backwards compatible with the SATA 1.5 Gb/s drives.

Current HP desktop products ship with SATA 6.0 Gb/s hard drives.

SATA data cables are susceptible to damage if overflexed. Never crease a SATA data cable and never bend it tighter than a 30 mm (1.18 in) radius.

The SATA data cable is a thin, 7-pin cable 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 drive. The SMART drive tracks fault prediction and failure indication parameters such as reallocated sector count, spin retry count, and calibration retry count. If the drive determines that a failure is imminent, it generates a fault alert.

18 Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation

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 pressure on them.

●Keep cables clear of sliding or moveable parts to prevent them from being cut or crimped when the parts are moved.

●When folding a flat ribbon cable, never fold to a sharp crease. Sharp creases may damage the wires.

●Some flat ribbon cables come prefolded. Never change the folds on these cables.

●Do not bend any cable sharply. A sharp bend can break the internal wires.

●Never bend a SATA data cable tighter than a 30 mm (1.18 in) radius.

●Never crease a SATA data cable.

●Do not rely on components like the drive cage, power supply, or computer cover to push cables down into the chassis. Always position the cables to lay properly by themselves.

Cable management 19

4Removal and replacement procedures – desktop mini (DM) chassis

Adherence to the procedures and precautions described in this chapter is essential for proper service. After completing all necessary removal and replacement procedures, run the Diagnostics utility to verify that all components operate properly.

NOTE: Not all features listed in this guide are available on all computers.

Preparation for disassembly

See Routine care, SATA drive guidelines, and disassembly preparation on page 12 for initial safety procedures.

1.Remove/disengage any security devices that prohibit opening the computer.

2.Remove all removable media, such as a USB flash drive, from the computer.

3. Turn o the computer properly through the operating system, then turn o any external devices.

CAUTION: Turn o the computer before disconnecting any cables.

Regardless of the power-on state, voltage is always present on the system board as long as the system is plugged into an active AC outlet. In some systems the cooling fan is on even when the computer is in the “Standby,” or “Suspend” modes. The power cord should always be disconnected before servicing a unit.

4.Disconnect the power cord from the power outlet and disconnect any external devices.

5.If the computer is on a stand, remove the computer from the stand.

WARNING! Beware of sharp edges inside the chassis.

20 Chapter 4 Removal and replacement procedures – desktop mini (DM) chassis

Top cover

1.Prepare the computer for disassembly (Preparation for disassembly on page 20).

2.Depending on the computer model, slide the cover lock switch (1) to the left , or loosen the thumbscrew

(1) on the rear panel as shown in the following images.

NOTE: If necessary, a Torx T-15 screwdriver may be used to loosen the thumbscrew.

3. Slide the access panel forward, and lift it o the computer (2).

NOTE: Your computer model may look slightly di erent from the illustrations in this section. To install the top cover, reverse the removal procedure.

Top cover 21

Front bezel

The front bezel is secured to the top cover by screws and tabs. The screws that secure the bezel to the top cover are in di erent locations depending on model.

1.Prepare the computer for disassembly (Preparation for disassembly on page 20).

2.Remove the top cover (Top cover on page 21).

3.Position the top cover upside-down so you can access the inside of the bezel.

4.Remove the two Torx screws (1) that secure the bezel to the top cover.

5.Disengage the tabs on the top, interior of the bezel (2).

6. Rotate the bezel o the top cover (3).

HP ProDesk 600 G3 and 400 G3 models

HP EliteDesk 800 G3 models

7.Remove the bezel from the top cover.

To install the front bezel, reverse the removal procedure.

22 Chapter 4 Removal and replacement procedures – desktop mini (DM) chassis

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