HP ProDesk 400 G4 (SFF) Maintenance and Service Guide

5 (2)

Maintenance and Service Guide

HP ProDesk 400 G4 Small Form Factor (SFF)

L.P.

Product notice

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, Core, and Celeron are trademarks of Intel Corporation in the U.S. and other countries. Microsoft and Windows are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries. SD Logo is a trademark of

its proprietor.

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

Not all features are available in all editions of Windows 10. This computer may require upgraded and/or separately purchased hardware, drivers and/or software to take full advantage of Windows 10 functionality. See http://www.microsoft.com for details.

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.

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: February 2017

Document Part Number: 913313-001

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.

About This Book

WARNING! Text set o in this manner indicates that failure to follow directions could result in bodily harm or loss of life.

CAUTION: Text set o in this manner indicates that failure to follow directions could result in damage to equipment or loss of information.

NOTE: Text set o in this manner provides important supplemental information.

iii

iv About This Book

Table of contents

1 Product features ...........................................................................................................................................	1
Standard con guration features ...........................................................................................................................	1
Front panel components ........................................................................................................................................	2
Rear panel components .........................................................................................................................................	3
2 Illustrated parts catalog ................................................................................................................................	4
Serial number location ..........................................................................................................................................	4
Computer major components ................................................................................................................................	4
Miscellaneous parts ...............................................................................................................................................	7
3 Routine care, SATA drive guidelines, and disassembly preparation ..................................................................	14
Electrostatic discharge information ....................................................................................................................	14
Generating static ...............................................................................................................................	14
Preventing electrostatic damage to equipment ...............................................................................	15
Personal grounding methods and equipment ..................................................................................	15
Grounding the work area ...................................................................................................................	16
Recommended materials and equipment ........................................................................................	16
Operating guidelines ...........................................................................................................................................	17
Routine care .........................................................................................................................................................	18
General cleaning safety precautions ................................................................................................	18
Cleaning the computer case ..............................................................................................................	18
Cleaning the keyboard .......................................................................................................................	19
Cleaning the monitor .........................................................................................................................	19
Cleaning the mouse ...........................................................................................................................	19
Service considerations .........................................................................................................................................	20
Tools and software requirements .....................................................................................................	20
Screws ...............................................................................................................................................	20
Cables and connectors ......................................................................................................................	20
Hard Drives ........................................................................................................................................	21
Lithium coin cell battery ....................................................................................................................	21
SATA hard drives ..................................................................................................................................................	22
SMART ATA drives ................................................................................................................................................	22
4 Removal and replacement procedures ...........................................................................................................	23
Preparation for disassembly ...............................................................................................................................	23
Access panel .........................................................................................................................................................	24

Front bezel ...........................................................................................................................................................	25
Dust cover ............................................................................................................................................................	26
Slim optical drive .................................................................................................................................................	27
Drive cage ............................................................................................................................................................	28
Hard drive .............................................................................................................................................................	29
Speaker ................................................................................................................................................................	31
WLAN module ......................................................................................................................................................	32
Memory module ...................................................................................................................................................	34
Expansion card .....................................................................................................................................................	35
Power supply .......................................................................................................................................................	37
Fan cowling ..........................................................................................................................................................	38
Fan-sink ...............................................................................................................................................................	39
Processor .............................................................................................................................................................	41
System board .......................................................................................................................................................	42
5 Computer Setup (F10) Utility ........................................................................................................................	44
Computer Setup (F10) Utilities ............................................................................................................................	44
Using Computer Setup (F10) Utilities ................................................................................................	44
Computer Setup–Main .......................................................................................................................	46
Computer Setup—Security ...............................................................................................................	48
Computer Setup—Advanced .............................................................................................................	50
Recovering the Con guration Settings ...............................................................................................................	55
6 Troubleshooting without diagnostics ............................................................................................................	56
Safety and comfort ..............................................................................................................................................	56
Before you call for technical support ..................................................................................................................	56
Helpful hints ........................................................................................................................................................	57
Solving general problems ....................................................................................................................................	58
Solving power problems ......................................................................................................................................	62
Solving hard drive problems ................................................................................................................................	63
Solving media card reader problems ...................................................................................................................	65
Solving display problems ....................................................................................................................................	66
Solving audio problems .......................................................................................................................................	70
Solving printer problems .....................................................................................................................................	72
Solving keyboard and mouse problems ..............................................................................................................	73
Solving hardware installation problems .............................................................................................................	76
Solving network problems ..................................................................................................................................	77
Solving memory problems ..................................................................................................................................	81
Solving USB flash drive problems ........................................................................................................................	82
Solving front panel component problems ..........................................................................................................	83
Solving Internet access problems .......................................................................................................................	83

Solving software problems ..................................................................................................................................	85
7 POST error messages and diagnostic front panel LEDs and audible codes .........................................................	86
POST numeric codes and text messages .............................................................................................................	86
Interpreting system validation diagnostic front panel LEDs and audible codes ................................................	91
8 Password security and resetting CMOS ..........................................................................................................	93
Resetting CMOS and/or the password jumper ....................................................................................................	94
Changing a Setup or Power-on password ...........................................................................................................	95
Deleting a Setup or Power-on password .............................................................................................................	96
9 Using HP PC Hardware Diagnostics (UEFI) .......................................................................................................	97
Downloading HP PC Hardware Diagnostics (UEFI) to a USB device ....................................................................	97
10 System backup and recovery ......................................................................................................................	99
Backing up, restoring, and recovering in Windows 10 ........................................................................................	99
Creating recovery media and backups ..............................................................................................	99
Creating HP Recovery media (select products only) ......................................................	99
Using Windows tools .......................................................................................................................	100
Restore and recovery ......................................................................................................................	100
Recovering using HP Recovery Manager ......................................................................	101
What you need to know before you get started ........................................	101
Using the HP Recovery partition (select products only) ............................	102
Using HP Recovery media to recover .........................................................	102
Changing the computer boot order ............................................................	102
Removing the HP Recovery partition (select products only) .....................	102
Backing up, restoring, and recovering in Windows 7 ........................................................................................	103
Creating recovery media .................................................................................................................	103
Creating recovery media using HP Recovery Manager (select models only) ...............	104
Creating recovery discs with HP Recovery Disc Creator (select models only) .............	105
Creating recovery discs ..............................................................................	105
Backing up your information ........................................................................................	105
System Restore ...............................................................................................................................	106
System Recovery .............................................................................................................................	106
System Recovery when Windows is responding ..........................................................	107
System Recovery when Windows is not responding ....................................................	107
System Recovery using recovery media (select models only) .....................................	108
Using HP Recovery Disc operating system discs (select models only) ........................	108
Appendix A Battery replacement ...................................................................................................................	110

vii

Appendix B Statement of memory volatility ...................................................................................................	113
Nonvolatile memory ..........................................................................................................................................	115
Questions and answers .....................................................................................................................................	118
Using HP Sure Start (select models only) ..........................................................................................................	119
Appendix C Power cord set requirements ........................................................................................................	120
General requirements ........................................................................................................................................	120
Japanese power cord requirements ..................................................................................................................	120
Country-speci c requirements ..........................................................................................................................	121
Appendix D peci c tions .............................................................................................................................	122
Index ...........................................................................................................................................................	123

viii

1Product features

Standard con gur tion features

Features may vary depending on the model. For support assistance and to learn more about the hardware and software installed on the computer model, run the HP Support Assistant utility.

Standard con guration features

Front panel components

(1)	Slim optical drive (optional)	(5)	Audio-out (headphone)/Audio-in (microphone)
			combo jackAudio-out (headphone)/Audio-in
			(microphone) combo jack

(2)	Memory card reader	(6)	Hard drive activity light

(3)	USB 2.0 port	(7)	Dual-state power button

(4)	USB 2.0 port with HP Sleep and Charge*

*This 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: When a device is plugged into the combo jack, a dialog box will open asking if you want to use the connector for a microphone line-in device or a headphone. You can recon gure the connector at any time by double-clicking the Audio Manager icon in

the Windows® taskbar.

2Chapter 1 Product features

Rear panel components

(1)	Audio-in jack	(5)	VGA monitor connector

(2)	RJ-45 (network) jack	(6)	USB 2.0 ports (2)

(3)	Audio-out jack for power audio devices	(7)	USB 3.x ports (2)

(4)	DisplayPort monitor connector	(8)	Power cord connector

NOTE:	When a device is plugged into the audio-in jack, a dialog box will open asking if you want to use the connector for
a microphone line-in device or a headphone. You can recon		gure the connector at any time by double-clicking the Audio Manager icon
in the Windows® taskbar.

When a graphics card is installed in one of the system board slots, the video connectors on the graphics card and the integrated graphics on the system board may be used at the same time. However, for such a con guration, only the display connected to the discrete graphics card will display POST messages.

The system board graphics can be disabled by changing settings in Computer Setup.

Rear panel components

2Illustrated parts catalog

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.

Computer major components

Description

Access panel:

For use on computer models in all country and regions except the People’s Republic of China

For use on computer models only in the People’s Republic of China

Front bezel

Blank bezel

Dust lter

System boards (includes replacement thermal material):

Equipped with the Windows 10 operating system for use in all countries and regions

Equipped with a non-Windows operating system for use in all countries and regions

Equipped with a non-Windows operating system for use in Brazil

Equipped with NetC operating system and PCI slots for use in the People’s Republic of China

Processors:

Intel Core i7-7700 3.60-GHz processor (8.0-MB L3 cache, quad core, 65-W)

Intel Core i7-6700 3.40-GHz processor (8.0-MB L3 cache, quad core, 65-W, R-0)

Intel Core i5-7600 3.50-GHz processor (6.0-MB L3 cache, quad core, 65-W)

Intel Core i5-7500 3.40-GHz processor (6.0-MB L3 cache, quad core, 65-W)

Intel Core i5-6500 3.20-GHz processor (6.0-MB L3 cache, quad core, 65-W, R-0)

4Chapter 2 Illustrated parts catalog

HP ProDesk 400 G4 (SFF) Maintenance and Service Guide

Description

Intel Core i3-7320 4.10-GHz processor (4.0-MB L3 cache, dual core, 65-W)

Intel Core i3-7300 4.00-GHz processor (4.0-MB L3 cache, dual core, 65-W)

Intel Core i3-7100 3.90-GHz processor (3.0-MB L3 cache, dual core, 65-W)

Intel Core i3-6100 3.7-GHz processor (3.0-MB L3 cache, dual core, 65-W, R-0)

Intel Celeron G4620 3.70-GHz processor (2.0-MB L3 cache, dual core, 65-W)

Intel Celeron G4600 3.60-GHz processor (2.0-MB L3 cache, dual core, 65-W)

Intel Celeron G4560 3.50-GHz processor (2.0-MB L3 cache, dual core, 65-W)

Intel Celeron G4500 3.50-GHz processor (3.0-MB L3 cache, dual core, 65-W)

Intel Celeron G4400 3.30-GHz processor (2.0-MB L3 cache, dual core, 65-W)

Intel Celeron G3950 3.00-GHz processor (2.0-MB L3 cache, dual core, 65-W)

Intel Celeron G3930 2.90-GHz processor (2.0-MB L3 cache, dual core, 65-W)

Intel Celeron G3900 2.80-GHz processor (2.0-MB L3 cache, dual core, 65-W)

180-W power supply (includes cables and plastic cable ties)

Fan-sink, 65-V (includes retention-clips)

Fan duct

Fan (includes cable)

Speaker, 2-W (includes cable)

LED holder

Hood sensor module

Optical drive:

DVD±RW SuperMulti 16X Drive, half-height

DVD-ROM Drive, 9.5-mm, slim

DVD±RW SuperMulti Drive, 9.5-mm, slim

Optical drive long bezel blank, 9.5-mm, slim

Optical drive latch, 9.5-mm, slim

Removable DP27 Kit, 9.5-mm, slim

Networking:

Intel 7265.NGWG.NV ac 2×2 + Bluetooth 4.0 LE PCIe + USB NGFF 2230 non-vPro Combo Adapter

Intel ac 2×2 + Bluetooth 4.2 M.2 PCI-e + USB non-vPro Combo Adapter

Intel ac 2×2 + Bluetooth 4.2 M.2 PCI-e + USB vPro Combo Adapter

Intel PRO/1000 single port network interface card

Realtek RTL8723BE b/g/n 1×1 + Bluetooth 4.0 LE PCIe + USB M.2 Combo Adapter

Antenna cover FXN

Internal wireless antenna cable assembly

Computer major components

Description

Memory modules (4, DDR4-2400, DIMM):

16-GB

8-GB

4-GB

2-GB

Fan

Heat sink (includes replacement thermal material)

Hard drive:

2-TB, 7200-rpm, 3.5-in, SATA

1-TB, 7200-rpm, 3.5-in, SATA

1-TB, 7200-rpm, Hybrid NAND

1-TB, 7200-rpm, 9.5-mm, SATA

1-TB, 5400-rpm, 9.5-mm, Hybrid 8-GB

500-GB, 7200-rpm, 3.5-in, SATA

500-GB, 7200-rpm, 7.0-mm, SATA

500-GB, 7200-rpm, SATA with self-encryption and OPAL2

500-GB, 5400-rpm with Federal Information Processing Standard (FIPS) security and OPAL2

500-GB, 5400-rpm, Hybrid 8-GB NAND with OPAL2

5.25-in–to–3.5-in hard drive adapter

3.5-in–to–2.5-in Universal Single Hard Drive Carrier

Hard drive isolation grommets, M3, black

Hard drive isolation grommets, M3, blue

Solid-state drive:

512-GB, self-encrypted solid-state drive with OPAL2 and triple-level cell (TLC)

512-GB, 2280 M.2, Non-Volatile Memory express (NVMe) solid-state drive with Secure Seal (SS)

256-GB, SATA-3 solid-state drive for use in all countries and regions except Brazil

256-GB, SATA-3 solid-state drive for use only in Brazil

256-GB, SATA-3 solid-state drive with TLC

256-GB, self-encrypted solid-state drive with OPAL2 and TLC

256-GB, 2280 M.2, NVMe solid-state drive with Opal2

256-GB, 2280 M.2, NVMe solid-state drive with SS

128-GB, SATA-3 solid-state drive for use only in Brazil

Rubber Feet Kit

6Chapter 2 Illustrated parts catalog

Miscellaneous parts

Description

Power cord with C13 receptacle, 1.83-meter (6.00-feet)

For use in Argentina

For use in Australia and New Zealand

For use in Brazil

For use in Denmark

For use in Europe

For use in Israel

For use in Italy

For use in the People’s Republic of China

For use in South Africa

For use in South Korea

For use in Switzerland

For use in Taiwan

For use in the United Kingdom and Singapore

Power cord with C13 receptacle, 1.83-meter (6.00-feet) 5-15P for use in Thailand

Power cord with C13 receptacle, 1.83-meter (6.00-feet) 6-amp for use in India

Power cord with Option-949 adapter ROHS

Adapters:

HP DisplayPort–to–DVI SL adapterx

HP DisplayPort–to–HDMI 1.4 adapterx

HP DisplayPort–to–VGA adapterx

HP USB Type-C–to–DisplayPort adapter

HP USB Type-C–to–USB 3.0 adapter

Cables:

DisplayPort cable (1.83-m)x

DVI–to–DVI monitor cable (RoHS)x

Hard drive SATA power cable (2×2-pin)

Optical drive SATA power cable (2×2-pin)

PS/2 plus serial port cable (200-mm)x

SATA cable (straight–to–straight connector, 6.1-in, RoHS2 only)x

SATA cable (straight–to–straight connector, 4.7-in, RoHS2 only)x

SATA power cable (includes gasket)x

SATA cable (straight–to–straight connector, 11-in)

Miscellaneous parts

Description

SATA cable (straight–to–straight connector, 8-in)

SATA cable (straight–to–straight connector, RF solution, 14-in)

SATA cable (straight–to–straight connector, RF solution, 11-in)

SATA cable (straight–to–straight connector, RF solution, 8-in)

Serial port cable (150-mm)

Expansion cards:

DisplayPort option board

DVI–to–VGA HF adapterx

HDMI option board

Parallel port PCIe x1 card

PS/2+Serial port assembly

Serial port assembly

USB 3.1 Type-C PCI-3 x1 LP card

USB Type-C option card

VGA option board

Graphics cards:

Nvidia GT730 1-GB PCIex8 graphics cardx

Nvidia GT730 2-GB PCIex8 graphics cardx

Graphics card supporting rubber

HP PS/2 slim Windows 8 keyboard:

For use in Belgium

For use in Bosnia, Herzegovina, Croatia, Slovenia, and Yugoslavia

For use in Bulgaria

For use in Canada

For use in the Czech Republic and Slovakia

For use in Denmark

For use in France

For use in Germany

For use in Greece

For use in Hungary

For use in India

For use in International countries and regions

For use in Israel

For use in Italy

8Chapter 2 Illustrated parts catalog

Description

For use in Japan

For use in Latin America

For use in North Africa

For use in Norway

For use in the People’s Republic of China

For use in Portugal

For use in Romania

For use in Russia

For use in Saudi Arabia

For use in South Korea

For use in Spain

For use in Sweden

For use in Switzerland

For use in Taiwan

For use in Thailand

For use in Turkey

For use in the United Kingdom and Singapore

For use in the United States

HP USB slim Windows 8 keyboard:

For use in Belgium

For use in Bosnia, Herzegovina, Croatia, Slovenia, and Yugoslavia

For use in Bulgaria

For use in Canada

For use in the Czech Republic and Slovakia

For use in Denmark

For use in France

For use in Germany

For use in Greece

For use in Hungary

For use in India

For use in International countries and regions

For use in Israel

For use in Italy

For use in Japan

Miscellaneous parts

Description

For use in Latin America

For use in North Africa

For use in Norway

For use in the People’s Republic of China

For use in Portugal

For use in Romania

For use in Russia

For use in Saudi Arabia

For use in South Korea

For use in Spain

For use in Sweden

For use in Switzerland

For use in Taiwan

For use in Thailand

For use in Turkey

For use in the United Kingdom and Singapore

For use in the United States

HP wireless Windows 8 keyboard, mouse, and dongle combination:

For use in Belgium

For use in BHCSY

For use in Bulgaria

For use in Canada

For use in the Czech Republic and Slovakia

For use in Denmark

For use in France

For use in Germany

For use in Greece

For use in Hungary

For use in India

For use in INT

For use in Israel

For use in Italy

For use in Japan

For use in Latin America

10 Chapter 2 Illustrated parts catalog

Description

For use in North Africa

For use in Norway

For use in the People’s Republic of China

For use in Portugal

For use in Romania

For use in Russia

For use in Saudi Arabia

For use in South Korea

For use in Spain

For use in Sweden

For use in Switzerland

For use in Taiwan

For use in Thailand

For use in Turkey

For use in the United Kingdom and Singapore

For use in the United States

HP Antimicrobial slim business keyboard for use in the People’s Republic of China

HP USB slim business keyboard in grey nish for use in Germany

USB keyboard:

For use in Belgium

For use in BHCSY

For use in Bulgaria

For use in Canada

For use in the Czech Republic and Slovakia

For use in Denmark

For use in France

For use in Germany

For use in Greece

For use in Hungary

For use in India

For use in INT

For use in Israel

For use in Italy

For use in Japan

Miscellaneous parts 11

Description

For use in Latin America

For use in North Africa

For use in Norway

For use in the People’s Republic of China

For use in Portugal

For use in Romania

For use in Russia

For use in Saudi Arabia

For use in South Korea

For use in Spain

For use in Sweden

For use in Switzerland

For use in Taiwan

For use in Thailand

For use in Turkey

For use in the United Kingdom and Singapore

For use in the United States

USB PS/2 washable Windows 8 keyboard (BFR-PVC):

For use in Canada

For use in Latin America

For use in the United States

Lock:

HP Business PC Security Lock Kit

HP dual head keyed cable lock

HP keyed cable lock

HP master keyed cable lock

Solenoid lock

Mouse:

HP PS/2 optical mouse

HP USB antimicrobial mouse

HP USB hardened mouse

HP USB laser mouse

HP USB mouse in grey nish

HP USB optical mouse

12 Chapter 2 Illustrated parts catalog

Description

USB PS/2 washable mouse

USB 2.0 SD3 Card reader

Miscellaneous parts 13

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. The power cord must be disconnected 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 how humidity a ects the electrostatic voltage levels generated by di erent activities. A product can be degraded by 700 volts.

● 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

14 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-sensitive 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 containers.

●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 snugly against bare skin. The ground cord must be

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

●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

Electrostatic discharge information 15

Grounding the work area

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

●Cover the work surface with approved static-dissipative material. Provide a wrist strap connected to the work surface and use 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.

Recommended materials and equipment

The following grounding equipment is recommended to prevent electrostatic damage:

●Antistatic tape

●Antistatic smocks, aprons, or sleeve protectors

●Conductive bins and other assembly or soldering aids

●Conductive foam

●Conductive tabletop workstations with ground cords of one-megohm +/- 10% resistance

●Static-dissipative table or floor mats with hard ties 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

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

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.

●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.

Operating guidelines 17

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 18 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 the surface with a cloth or swab dampened with clear water.

●For stubborn stains, use isopropyl (rubbing) alcohol. No rinsing is needed; alcohol will evaporate quickly without leaving 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.

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

Cleaning the keyboard

Follow all safety precautions in General cleaning safety precautions on page 18 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 18.

When cleaning debris from under the keys, review all rules in General cleaning safety precautions on page 18 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.

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

CAUTION: Never remove a wide, level 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 then 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 towelette designed for cleaning monitors or with a clean cloth moistened with water. 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 18.

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 18.

Routine care 19

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

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

●Phillips #2 screwdriver

●Diagnostics software

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.

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.

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

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 general household waste. In order to forward them for recycling or proper disposal, please use the public collection system or return them to HP.

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

SMART ATA drives

The Self Monitoring Analysis and Recording Technology (SMART) ATA drives for HP personal computers have built-in drive failure prediction that warns the user or network administrator of an impending failure (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.

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