HP EliteDesk 705 G3 Maintenance and Service Guide

Maintenance and Service Guide

HP EliteDesk 705 G3 Desktop Mini

AMD is a trademark of Advanced Micro Devices, Inc. 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: August 2016

Document Part Number: 865598-001

Product notice

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

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, at 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 airow. 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 components .................................................................................................................................................. 1

Rear components ................................................................................................................................................... 2

Serial number location .......................................................................................................................................... 3

2 Illustrated parts catalog ................................................................................................................................ 4

Desktop Mini (DM) chassis spare parts .................................................................................................................. 4

Computer major components ............................................................................................................. 4

Cables .................................................................................................................................................. 5

Misc parts ............................................................................................................................................. 6

Drives ................................................................................................................................................... 8

3 Routine care, SATA drive guidelines, and disassembly preparation .................................................................... 9

Electrostatic discharge information ...................................................................................................................... 9

Generating static ................................................................................................................................. 9

Preventing electrostatic damage to equipment ............................................................................... 10

Personal grounding methods and equipment .................................................................................. 10

Grounding the work area ................................................................................................................... 10

Recommended materials and equipment ........................................................................................ 11

Operating guidelines ........................................................................................................................................... 11

Routine care ......................................................................................................................................................... 12

General cleaning safety precautions ................................................................................................ 12

Cleaning the Computer Case ............................................................................................................. 12

Cleaning the keyboard ....................................................................................................................... 12

Cleaning the monitor ......................................................................................................................... 13

Cleaning the mouse ........................................................................................................................... 13

Service considerations ......................................................................................................................................... 13

Tools and software Requirements .................................................................................................... 13

Screws ............................................................................................................................................... 13

Cables and connectors ...................................................................................................................... 14

Hard Drives ........................................................................................................................................ 14

Lithium coin cell battery .................................................................................................................... 14

SATA hard drives .................................................................................................................................................. 15

SATA hard drive cables ......................................................................................................................................... 15

SATA data cable ................................................................................................................................. 15

SMART ATA drives ................................................................................................................................................ 15

Cable management .............................................................................................................................................. 16

4 Removal and replacement procedures – desktop mini (DM) chassis .................................................................. 17

Warnings and cautions ........................................................................................................................................ 17

Preparation for disassembly ............................................................................................................................... 18

Access panel ......................................................................................................................................................... 19

Front bezel ........................................................................................................................................................... 20

Power switch/light cover ..................................................................................................................................... 21

Speaker ................................................................................................................................................................ 22

Hard drive ............................................................................................................................................................. 23

Drive cage ............................................................................................................................................................ 25

M.2 PCIe solid state drive (SSD) ........................................................................................................................... 26

WLAN module ...................................................................................................................................................... 28

External antenna ................................................................................................................................................. 30

Battery ................................................................................................................................................................. 32

Thermal sensor .................................................................................................................................................... 34

Fan ........................................................................................................................................................................ 35

Memory modules ................................................................................................................................................. 37

Memory modules ............................................................................................................................... 37

Memory module specications ......................................................................................................... 37

Populating memory module slots .................................................................................................... 38

Installing memory modules .............................................................................................................. 39

Heat sink .............................................................................................................................................................. 41

Processor ............................................................................................................................................................. 43

Expansion connector board ................................................................................................................................. 44

System board ....................................................................................................................................................... 45

System board callouts ....................................................................................................................... 47

Internal WLAN antenna cables ............................................................................................................................ 48

Changing from desktop to tower conguration .................................................................................................. 51

5 Computer Setup (F10) Utility ........................................................................................................................ 52

Computer Setup (F10) Utilities ............................................................................................................................ 52

Using Computer Setup (F10) Utilities ................................................................................................ 52

Computer Setup–Main ....................................................................................................................... 54

Computer Setup—Security ............................................................................................................... 56

Computer Setup—Advanced ............................................................................................................. 58

Recovering the Conguration Settings ............................................................................................................... 63

6 Troubleshooting without diagnostics ............................................................................................................ 64

Safety and comfort .............................................................................................................................................. 64

Before you call for technical support .................................................................................................................. 64

Helpful hints ........................................................................................................................................................ 65

Solving general problems .................................................................................................................................... 66

Solving power problems ...................................................................................................................................... 70

Solving hard drive problems ................................................................................................................................ 71

Solving media card reader problems ................................................................................................................... 73

Solving display problems .................................................................................................................................... 74

Solving audio problems ....................................................................................................................................... 78

Solving printer problems ..................................................................................................................................... 80

Solving keyboard and mouse problems .............................................................................................................. 81

Solving Hardware Installation Problems ............................................................................................................. 82

Solving Network Problems .................................................................................................................................. 84

Solving memory problems .................................................................................................................................. 87

Solving CD-ROM and DVD problems .................................................................................................................... 88

Solving USB ash drive problems ........................................................................................................................ 90

Solving front panel component problems .......................................................................................................... 91

Solving Internet access problems ....................................................................................................................... 91

Solving software problems .................................................................................................................................. 92

7 POST error messages and diagnostic front panel LEDs and audible codes ......................................................... 94

POST numeric codes and text messages ............................................................................................................. 94

Interpreting system validation diagnostic front panel LEDs and audible codes ................................................ 99

8 Password security and resetting CMOS ........................................................................................................ 101

Resetting the password jumper ........................................................................................................................ 101

Clearing and resetting the BIOS ........................................................................................................................ 103

9 Using HP PC Hardware Diagnostics (UEFI)HP PC Hardware Diagnostics ........................................................... 105

Downloading HP PC Hardware Diagnostics (UEFI) to a USB device .................................................................. 105

10 System backup and recovery ..................................................................................................................... 107

Backing up, restoring, and recovering in Windows 10 ...................................................................................... 107

Creating recovery media and backups ............................................................................................ 107

Creating HP Recovery media (select products only) .................................................... 107

Using Windows tools ....................................................................................................................... 108

Restore and recovery ...................................................................................................................... 108

Recovering using HP Recovery Manager ...................................................................... 109

What you need to know before you get started ........................................ 109

vii

Using the HP Recovery partition (select products only) ............................ 110

Using HP Recovery media to recover ......................................................... 110

Changing the computer boot order ............................................................ 110

Removing the HP Recovery partition (select products only) ..................... 110

Backing up, restoring, and recovering in Windows 7 ........................................................................................ 111

Creating recovery media ................................................................................................................. 111

Creating recovery media using HP Recovery Manager (select models only) ............... 112

Creating recovery discs with HP Recovery Disc Creator (select models only) ............. 113

Creating recovery discs .............................................................................. 113

Backing up your information ........................................................................................ 113

System Restore ............................................................................................................................... 114

System Recovery ............................................................................................................................. 114

System Recovery when Windows is responding .......................................................... 115

System Recovery when Windows is not responding .................................................... 115

System Recovery using recovery media (select models only) ..................................... 116

Using HP Recovery Disc operating system discs (select models only) ........................ 116

Appendix A Power Cord Set Requirements ...................................................................................................... 118

General Requirements ....................................................................................................................................... 118

Japanese Power Cord Requirements ................................................................................................................. 118

Country-Specic Requirements ........................................................................................................................ 119

Appendix B Statement of Volatility ................................................................................................................ 120

Appendix C Specications ............................................................................................................................. 121

Index ........................................................................................................................................................... 122

viii

1 Product features

Standard conguration 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 stand is sold

separately.

Front components

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

Item Icon Component Item Icon Component

1 Audio-out (headphone) jack 4 USB port

2 Audio-out (headphone)/Audio-in (microphone)

combo jack

3 USB 3.0 (charging) port 6 Power button

NOTE: When the computer is on, the USB 3.x charging port connects and charges a USB device, such as a cell phone, camera, activity

tracker, or smartwatch, and provides high-speed data transfer.

5 Hard drive activity light

Standard conguration features 1

Rear components

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

Item Component Item Component

1 External antenna 8 Power cord retention hook

2 Dual-Mode DisplayPort (D++) 9 USB ports (2)

3 VGA monitor port 10 Padlock loop

4 External antenna connectors (2) 11 RJ-45 (network) jack

5 DisplayPort, HDMI (shown), VGA, or Serial

connector*

6 Thumbscrew 13 Power connector

7 USB 3.0 ports (2) (blue)

* Optional

12 Security cable slot

2 Chapter 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 customer service for assistance.

Serial number location 3

2 Illustrated 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

(1) Access panel

(2) Front bezel

(3) External power supply, 90W

90 W

65 W

(4) System board (includes replacement thermal material)

(5) Memory modules (SODIMM, DDR4, PC4-17000, 2133-MHz)

4 Chapter 2 Illustrated parts catalog

Cables

Item Description

16 GB

8 GB

4 GB

2 GB

* AMD processors

AMD PRO A12-9800E APU with AMD Radeon™ R7 HD Graphics

AMD PRO A10-9700E APU with AMD Radeon R7 HD Graphics

AMD PRO A6-9500E APU with AMD Radeon R5 HD Graphics

Item Description

(1) SATA cable/connector

NOTE: Included with computer.

Tab color may vary.

* Adapter, DisplayPort to HDMI 1.4

* Adapter, DisplayPort to VGA

* Adapter, DisplayPort to DVI

* USB to serial adapter

* DVI cable

* DisplayPort cable

Desktop Mini (DM) chassis spare parts 5

Misc parts

Item Description

(1) Heat sink

(2) Fan

(3) Speaker

(4) Power switch/light cover

(5) Option board, HDMI

(6) Option board, serial port

* Option board, DisplayPort (not illustrated)

(7) Thermal sensor

* Stand

* Port cover

* Thermal pads

* WLAN modules:

Intel Dual Band Wireless-AC 7265 NV

Intel Dual Band Wireless-AC 8260 + Bluetooth 4.0

6 Chapter 2 Illustrated parts catalog

Item Description

Intel Dual Band Wireless-AC 3165 + Bluetooth 4.0

* External antenna kit

* Expansion Module Kit

Hard drive – I/O

I/O

Optical drive

* Speaker phone security sleeve

* Security/Dual VESA sleeve

* HP Speaker Phone

* Mouse

USB, laser

USB, optical

Wireless

Antimicrobial

Hardened

* Keyboards

USB slim

Washable

Wireless

Conferencing

Desktop Mini (DM) chassis spare parts 7

Drives

Description

Hard drives, 2.5-inch

1 TB, 7200 rpm, hard drive

1 TB, 5400 rpm, hard drive, SSHD (hybrid SSD)

500 GB, 7200 rpm hard drive

500 GB, 5400 rpm, SSHD (hybrid SSD)

500 GB, 7200 rpm hard drive, OPAL 2, SED

500 GB, 5400 rpm hard drive, FIPS

Solid-state drives, 2.5-inch

512 GB, TLC

512 GB, self-encrypting (SED), OPAL2, TLC

256 GB, TLC

240 GB, TLC

128 GB

M.2 drives

512 GB, NVMe, 2280, TLC, M.2, PCIe

512 GB, NVMe, TLC, M.2

256 GB, NVMe, 2280, SS, M.2, PCIe-3x4

256 GB, NVMe, TLC, M.2, PCIe

8 Chapter 2 Illustrated parts catalog

3 Routine 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

Walking across vinyl oor

Motions of bench worker

Removing DIPs from plastic tube

Removing DIPs from vinyl tray

Removing DIPs from Styrofoam

Removing bubble pack from PCB

Packing PCBs in foam-lined box

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

7,500 V

3,000 V

400 V

2,000 V

3,500 V

7,000 V

5,000 V

15,000 V

5,000 V

800 V

700 V

4,000 V

5,000 V

20,000 V

11,000 V

35,000 V

12,000 V

6,000 V

2,000 V

11,500 V

14,500 V

26,500 V

21,000 V

NOTE: 700 volts can degrade a product.

Electrostatic discharge information 9

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 exible 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 oors or dissipative oor 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

Carbon-loaded plastic

Metallized laminate

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.

1,500

7,500

15,000

●

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.

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

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 oor 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 airow.

●

Never restrict the airow 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 airow.

●

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 airow. 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.

Operating guidelines 11

●

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 ammable 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 12 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 airow.

Cleaning the keyboard

Follow all safety precautions in General cleaning safety precautions on page 12 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 12.

When cleaning debris from under the keys, review all rules in General cleaning safety precautions on page 12 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.

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

●

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 ammable liquids on the monitor.

●

To clean the monitor body follow the procedures in Cleaning the Computer Case on page 12.

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 12.

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.

Service considerations 13

Cables and connectors

Most cables used throughout the unit are at, exible 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.

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

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 overexed. 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.

SATA hard drives 15

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 at ribbon cable, never fold to a sharp crease. Sharp creases may damage the wires.

●

Some at 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.

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

4 Removal 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.

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.

Warnings and cautions

Before performing upgrades be sure to carefully read all of the applicable instructions, cautions, and warnings in this guide.

WARNING! To reduce the risk of personal injury from electrical shock, hot surfaces, or re:

Disconnect the power cord from the AC outlet and allow the internal system components to cool before touching.

Do not connect telecommunications or telephone connectors to the network interface controller (NIC) receptacles.

Do not disable the power cord grounding plug. The grounding plug is an important safety feature.

Plug the power cord in a grounded (earthed) AC outlet that is easily accessible at all times.

To reduce the risk of serious injury, read the Safety & Comfort Guide. It describes proper workstation, setup, posture, and health and work habits for computer users, and provides important electrical and mechanical safety information. This guide is located on the web at

WARNING! Energized and moving parts inside.

Disconnect power to the equipment before removing the enclosure.

Replace and secure the enclosure before re-energizing the equipment.

CAUTION: Static electricity can damage the electrical components of the computer or optional equipment.

Before beginning these procedures, ensure that you are discharged of static electricity by briey touching a grounded metal object. See Electrostatic discharge information on page 9 for more information.

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 damage to internal components.

NOTE: Your computer model may look slightly dierent from the illustrations in this chapter.

http://www.hp.com/ergo.

Warnings and cautions 17

Preparation for disassembly

See Routine care, SATA drive guidelines, and disassembly preparation on page 9 for initial safety procedures.

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

2. Remove all removable media, such as a USB ash 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.

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

Access panel

To access internal components, you must remove the access panel:

1. Prepare the computer for disassembly (Preparation for disassembly on page 18).

2. Loosen the thumbscrew on the rear of the computer (1).

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

3. Slide the panel forward and lift if o the computer (2).

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

Access panel 19

Front bezel

The front bezel is secured to the top cover by tabs.

1. Prepare the computer for disassembly (Preparation for disassembly on page 18).

2. Remove the access panel (Access panel on page 19).

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

4. Pull down to loosen the bottom, interior on the bezel (1).

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

6. Remove the bezel from the top cover.

To install the front bezel, reverse the removal procedure.

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

Power switch/light cover

The power switch/light cover is located at the front, right of the computer, under the top cover.

1. Prepare the computer for disassembly (Preparation for disassembly on page 18).

2. Remove the access panel (Access panel on page 19).

3. Rotate the top of the cover away from the computer and lift it o the system board.

To install the power switch/light cover, reverse the removal procedure.

Power switch/light cover 21

Speaker

A single speaker is located on the left side of the computer behind the front bezel, inside the chassis. It is secured by a white peg that you pull out to release.

To remove the speaker:

1. Prepare the computer for disassembly (Preparation for disassembly on page 18).

2. Remove the access panel (Access panel on page 19).

3. Disconnect the speaker cable from the system board connector (1).

4. From the front of the computer, pull to remove the white peg that secures the speaker (2).

5. Lift to remove the speaker from the computer.

To install the speaker, reverse the removal procedures.

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

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