HP ProDesk 400 G2 Maintenance and Service Guide

4 (1)

Maintenance and Service Guide

HP ProDesk 400 G2 Small Form Factor

Microsoft and Windows are U.S. registered trademarks of the Microsoft group of companies.

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.

This document contains proprietary information that is protected by copyright. No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of HewlettPackard Company.

First Edition (December 2014)

Document Part Number: 796112-001

Product notice

This 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 8. Your computer may require upgraded and/or separately purchased hardware, drivers, and/or software to take full advantage of Windows 8 functionality. See http://www.microsoft.com for details.

This computer may require upgraded and/or separately purchased hardware and/or a DVD drive to install the Windows 7 software and take full advantage of Windows 7 functionality. See http://windows.microsoft.com/en-us/ windows7/get-know-windows-7 for details.

About This Book

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

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

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

iii

iv About This Book

Table of contents

1 Product features ...........................................................................................................................................	1
Standard configuration features ...........................................................................................................................	1
Front panel components .......................................................................................................................................	2
Rear panel components .........................................................................................................................................	3
Serial number location ..........................................................................................................................................	4
2 Illustrated parts catalog ................................................................................................................................	5
Computer major components ................................................................................................................................	5
Cables .....................................................................................................................................................................	7
Misc parts ...............................................................................................................................................................	8
Drives .....................................................................................................................................................................	9
Misc boards ..........................................................................................................................................................	10
3 Routine care, SATA drive guidelines, and disassembly preparation ..................................................................	11
Electrostatic discharge information ...................................................................................................................	11
Generating static ...............................................................................................................................	12
Preventing electrostatic damage to equipment ..............................................................................	12
Personal grounding methods and equipment ..................................................................................	12
Grounding the work area ..................................................................................................................	13
Recommended materials and equipment ........................................................................................	13
Operating guidelines ...........................................................................................................................................	14
Routine care .........................................................................................................................................................	14
General cleaning safety precautions ................................................................................................	14
Cleaning the Computer Case .............................................................................................................	14
Cleaning the keyboard ......................................................................................................................	15
Cleaning the monitor .........................................................................................................................	15
Cleaning the mouse ...........................................................................................................................	15
Service considerations ........................................................................................................................................	16
Power supply fan ...............................................................................................................................	16
Tools and software Requirements ...................................................................................................	16
Screws ...............................................................................................................................................	16
Cables and connectors ......................................................................................................................	16
Hard Drives ........................................................................................................................................	17
Lithium coin cell battery ...................................................................................................................	17
SATA hard drives ..................................................................................................................................................	17
SATA hard drive cables ........................................................................................................................................	18

SATA data cable .................................................................................................................................	18
SMART ATA drives ................................................................................................................................................	18
Cable management ..............................................................................................................................................	18
4 Removal and replacement procedures: Small Form Factor ..............................................................................	19
Preparation for disassembly ...............................................................................................................................	19
Access panel ........................................................................................................................................................	20
Front bezel ...........................................................................................................................................................	21
Front bezel security .............................................................................................................................................	22
Bezel blanks .........................................................................................................................................................	23
Memory ................................................................................................................................................................	24
DIMMs ................................................................................................................................................	24
DDR3-SDRAM DIMMs .........................................................................................................................	24
Populating DIMM sockets ..................................................................................................................	25
Installing DIMMs ................................................................................................................................	25
Expansion card ....................................................................................................................................................	27
System board connections ..................................................................................................................................	30
Drives ...................................................................................................................................................................	32
Drive positions ...................................................................................................................................	34
Removing a 3.5-inch device ..............................................................................................................	34
Installing a 3.5-inch device ...............................................................................................................	35
Removing a slim optical drive ...........................................................................................................	38
Installing a slim optical drive ............................................................................................................	39
Removing and replacing a 3.5-inch hard drive .................................................................................	40
Removing a 2.5-inch hard drive ........................................................................................................	43
Installing a 2.5-inch hard drive .........................................................................................................	43
Power supply .......................................................................................................................................................	45
Fan duct ...............................................................................................................................................................	47
Front I/O assembly ..............................................................................................................................................	48
Power switch assembly .......................................................................................................................................	51
Speaker ................................................................................................................................................................	53
Fan sink ................................................................................................................................................................	55
Processor .............................................................................................................................................................	57
System board .......................................................................................................................................................	59
Changing from desktop to tower configuration .................................................................................................	60
5 Computer Setup (F10) Utility ........................................................................................................................	61
Computer Setup (F10) Utilities ............................................................................................................................	61
Using Computer Setup (F10) Utilities ...............................................................................................	62
Computer Setup—File ......................................................................................................................	63
Computer Setup—Storage ...............................................................................................................	64

Computer Setup—Security ...............................................................................................................	65
Computer Setup—Power ..................................................................................................................	68
Computer Setup—Advanced ............................................................................................................	69
Recovering the Configuration Settings ...............................................................................................................	71
6 Troubleshooting without diagnostics ............................................................................................................	72
Safety and comfort ..............................................................................................................................................	72
Before you call for technical support ..................................................................................................................	72
Helpful hints ........................................................................................................................................................	73
Solving general problems ...................................................................................................................................	74
Solving power problems ......................................................................................................................................	78
Solving hard drive problems ...............................................................................................................................	79
Solving media card reader problems ..................................................................................................................	81
Solving display problems ....................................................................................................................................	82
Solving audio problems .......................................................................................................................................	86
Solving printer problems .....................................................................................................................................	88
Solving keyboard and mouse problems .............................................................................................................	89
Solving Hardware Installation Problems ............................................................................................................	91
Solving Network Problems ..................................................................................................................................	93
Solving memory problems ..................................................................................................................................	97
Solving processor problems ................................................................................................................................	98
Solving CD-ROM and DVD problems ....................................................................................................................	99
Solving USB flash drive problems .....................................................................................................................	101
Solving front panel component problems ........................................................................................................	101
Solving Internet access problems .....................................................................................................................	102
Solving software problems ...............................................................................................................................	103
7 POST error messages .................................................................................................................................	105
POST numeric codes and text messages ..........................................................................................................	105
Interpreting POST diagnostic front panel LEDs and audible codes ..................................................................	112
8 Password security and resetting CMOS ........................................................................................................	115
Resetting the password jumper ........................................................................................................................	115
Clearing and resetting the CMOS .......................................................................................................................	116
9 HP PC Hardware Diagnostics .......................................................................................................................	118
Why run HP PC Hardware Diagnostics ..............................................................................................................	118
How to access and run HP PC Hardware Diagnostics .......................................................................................	118
Downloading HP PC Hardware Diagnostics (UEFI) to a USB device ..................................................................	118

vii

10 System backup and recovery ....................................................................................................................	120
Backing up, restoring, and recovering in Windows 8.1 or Windows 8 .............................................................	120
Creating recovery media and backups ...........................................................................................	120
Restoring and recovering using Windows tools .............................................................................	120
Using Reset when the system is not responding .........................................................	121
Recovery using the Windows recovery USB flash drive ...............................................	121
Recovery using Windows operating system media (purchased separately) ..............	122
Backing up, restoring, and recovering in Windows 7 ........................................................................................	122
Creating recovery media .................................................................................................................	123
Creating recovery media using HP Recovery Manager (select models only) ..............	123
Creating recovery discs with HP Recovery Disc Creator (select models only) ............	124
Creating recovery discs ..............................................................................	124
Backing up your information ........................................................................................	125
System Restore ...............................................................................................................................	125
System Recovery .............................................................................................................................	126
System Recovery when Windows is responding ..........................................................	126
System Recovery when Windows is not responding ...................................................	127
System Recovery using recovery media (select models only) ....................................	127
Using HP Recovery Disc operating system discs (select models only) .......................	128
Appendix A Battery replacement ...................................................................................................................	130
Appendix B Statement of Volatility ................................................................................................................	133
Appendix C Power cord set requirements ........................................................................................................	135
General requirements .......................................................................................................................................	135
Japanese power cord requirements .................................................................................................................	135
Country-specific requirements .........................................................................................................................	136
Appendix D Specifications .............................................................................................................................	137
Index ...........................................................................................................................................................	138

viii

1 Product features

Standard configuration 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.

Standard configuration features

Front panel components

Drive configuration may vary by model. Some models have a bezel blank covering one or more drive bays.

1	Slim Optical Drive (optional)	5	Headphone Connector

2	USB 2.0 Ports (black)	6	Dual-State Power Button

3	USB 3.0 Ports (blue)	7	Hard Drive Activity Light

4	Microphone Connector	8	3.5-inch Media Card Reader (optional)

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

2 Chapter 1 Product features

Rear panel components

1	PS/2 Mouse Connector (green)	6	Power Cord Connector

2	RJ-45 Network Connector	7	PS/2 Keyboard Connector (purple)

3	Serial Connector	8	DisplayPort Monitor Connector

4	USB 2.0 Ports (black)	9	VGA Monitor Connector

5	Line-In Audio Connector (blue)	10	Line-Out Connector for powered audio
			devices (green)

NOTE: An optional second serial port and an optional parallel port are available from HP.

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 configuration, 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

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.

4 Chapter 1 Product features

HP ProDesk 400 G2 Maintenance and Service Guide

2 Illustrated parts catalog

Computer major components

This chapter provides part information for all chassis.

Item Description

(1)Front bezel

(2)Access panel

(3)Power supply

240W, 85% efficient 240W, standard

Computer major components

Item Description

(4)System board (includes replacement thermal material) For use in models without Windows 8

For use in models with Windows 8 Standard For use in models with Windows 8 Professional

For use in models with NetClone (the People’s Republic of China only)

Memory modules (PC3,12800, CL11) 8-GB

4-GB

2-GB

Processors (include replacement thermal material) Intel Core i7 4790 (3.6-GHz, 8-MB L3 cache), 84W Intel Core i7 4790s (3.2-GHz, 8-MB L3 cache), 65W Intel Core i7 4771 (3.5-GHz, 8-MB L3 cache), 84W Intel Core i7 4770 (3.4-GHz, 8-MB L3 cache), 84W Intel Core i7 4770s (3.1-GHz, 8-MB L3 cache), 65W Intel Core i5 4690 (3.5-GHz, 6-MB L3 cache), 84W Intel Core i5 4690s (3.2-GHz, 6-MB L3 cache), 65W Intel Core i5 4670 (3.4-GHz, 6-MB L3 cache), 84W Intel Core i5 4670s (3.1-GHz, 6-MB L3 cache), 65W Intel Core i5 4590 (3.3-GHz, 6-MB L3 cache), 84W Intel Core i5 4590s (3.0-GHz, 6-MB L3 cache), 65W Intel Core i5 4570 (3.2-GHz, 6-MB L3 cache), 84W Intel Core i5 4570s (2.9-GHz, 6-MB L3 cache), 65W Intel Core i5 4430 (3.0-GHz, 6-MB L3 cache), 84W Intel Core i5 4430s (2.7-GHz, 6-MB L3 cache), 65W Intel Core i3 4370 (3.8-GHz, 4-MB L3 cache), 54W Intel Core i3 4360 (3.7-GHz, 4-MB L3 cache), 54W Intel Core i3 4350 (3.6-GHz, 4-MB L3 cache), 54W Intel Core i3 4340 (3.6-GHz, 4-MB L3 cache), 54W Intel Core i3 4330 (3.5-GHz, 4-MB L3 cache), 54W Intel Core i3 4160 (3.6-GHz, 4-MB L3 cache), 54W Intel Core i3 4150 (3.5-GHz, 4-MB L3 cache), 54W Intel Core i3 4130 (3.4-GHz, 4-MB L3 cache), 54W Intel Pentium G3460 (3.5-GHz, 3-MB L3 cache), 53W

6 Chapter 2 Illustrated parts catalog

Item Description

Intel Pentium G3450 (3.4-GHz, 3-MB L3 cache), 54W

Intel Pentium G3440 (3.3-GHz, 3-MB L3 cache), 54W

Intel Pentium G3430 (3.3-GHz, 3-MB L3 cache), 54W

Intel Pentium G3420 (3.2-GHz, 3-MB L3 cache), 54W

Intel Pentium G3250 (3.2-GHz, 3-MB L3 cache), 53W

Intel Pentium G3240 (3.1-GHz, 3-MB L3 cache), 54W

Intel Pentium G3220 (3.0-GHz, 3-MB L3 cache), 54W

Intel Celeron G1850 (2.9-GHz, 2-MB L3 cache)

Intel Celeron G1840 (2.8-GHz, 2-MB L3 cache)

Cables

Item Description

(1)Front I/O assembly

(2)Power switch assembly SATA drive power cable

SATA data cable, 19.5 inch, 2 straight ends

SATA data cable, 14.0 inch, 1 straight end, 1 right angle

DMS-59 to dual VGA cable DMS-59 to dual DVI cable Adapter, DisplayPort to VGA Adapter, DisplayPort to DVI Adapter, DisplayPort to HDMI Adapter, DVI to VGA

Adapter, DVI-I to VGA (BFR/PVC free)

Adapter, DVI-I to VGA (Standard)

DisplayPort cable

Cables 7

Misc parts

Item Description

(1)Fan sink (includes replacement thermal material)

(2)Speaker

(3)Printer port, PCI card

(4)Fan duct

(5)Serial port, PCI card

Card reader, 14-in-1, USB 3.0, 3.5-inch

Card reader, 15-in-1, USB 3.0, 3.5-inch, UHS-II

Adapter, USB 3.0 to 2.0 Optical drive bezel blank

Grommet, hard drive

HP Ultraslim Keyed Cable Lock

Clamp lock, universal cable, without plate

Chassis stand

Hard drive carrier, 2.5-inch to 3.5-inch WLAN antennas

8 Chapter 2 Illustrated parts catalog

Item Description

Mouse

PS2, optical

USB, HP Elite

Washable

HP USB Antimicrobial

USB, optical

Keyboard

PS/2

USB

Wireless, HP Elite with USB dongle (for use only in Brazil)

Unbranded

USB, unbranded, Katydid

Smart card, CCID

Wireless keyboard, mouse, and dongle kit (for use in all countries except for Brazil)

Washable

HP USB Antimicrobial

Drives

Description

Hard drive

2 TB, 7200 rpm, 3.5 inch

1 TB, 10000 rpm

1 TB, 7200 rpm, 3.5 inch

1 TB hard drive, hybrid SSD

500 GB, 10000 rpm

500 GB, 7200 rpm, 2.5 inch

500 GB, 7200 rpm, 2.5 inch, self-encrypting (SED)

500 GB, 5400 rpm, 2.5 inch, FIPS

500 GB hard drive, hybrid SSD

256-GB Solid-state Drive (SSD), self-encrypting (SED)

256-GB Solid-state Drive (SSD)

180-GB Solid-state Drive (SSD), MLC

128-GB Solid-state Drive (SSD)

Drives 9

Description

128-GB Solid-state Drive (SSD), self-encrypting (SED)

120-GB Solid-state Drive (SSD), MLC

32-GB Solid-state Drive (SSD), 2.5 inch, MLC

Optical drive

Blu-ray BD-RW SuperMulti XL Drive

DVD±RW drive

DVD-ROM drive

NOTE: 2.5-inch solid-state drives require an adapter for installation.

Misc boards

Description

Nvidia NVS310 PCIe x16 graphics card, 512 MB

Nvidia NVS315 PCIe x16 graphics card, 1 GB

AMD Radeon HD8490 DP PCIe x16 graphics card, 1 GB

AMD Radeon HD8450 PCIe x16 graphics card, 1 GB

AMD Radeon HD8350 DH PCIe x16 graphics card, 1 GB DDR3

Intel PRO/1000 single port GbE NIC, includes bracket

Intel 802.11 a/b/g/n + Bluetooth 4.0 Wireless NIC

Intel Dual Band Wireless-N 7260 802.11 a/b/g/n (2x2) Wireless NIC

10 Chapter 2 Illustrated parts catalog

3Routine care, SATA drive guidelines, and disassembly preparation

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

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

Electrostatic discharge information

A sudden discharge of static electricity from your finger 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 affected 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.

Electrostatic discharge information 11

Generating static

The following table shows that:

●Different activities generate different amounts of static electricity.

●Static electricity increases as humidity decreases.

		Relative Humidity

Event	55%	40%	10%

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

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

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

NOTE: 700 volts can degrade a product.

Preventing electrostatic damage to equipment

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

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

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

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

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

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

●Avoid contact with pins, leads, or circuitry.

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

Personal grounding methods and equipment

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

●Wrist straps are flexible straps with a maximum of one-megohm ± 10% resistance in the ground cords. To provide proper ground, a strap must be worn snug against bare skin. The ground cord must be connected and fit snugly into the banana plug connector on the grounding mat or workstation.

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

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

	Static Shielding Protection Levels

Method	Voltage

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

Grounding the work area

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

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

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

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

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

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

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

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

Recommended materials and equipment

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

●Antistatic tape

●Antistatic smocks, aprons, or sleeve protectors

●Conductive bins and other assembly or soldering aids

●Conductive foam

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

●Static-dissipative table or floor mats with hard tie to ground

●Field service kits

●Static awareness labels

●Wrist straps and footwear straps providing one-megohm +/- 10% resistance

●Material handling packages

●Conductive plastic bags

●Conductive plastic tubes

●Conductive tote boxes

●Opaque shielding bags

Electrostatic discharge information 13

●Transparent metallized shielding bags

●Transparent shielding tubes

Operating guidelines

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

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

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

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

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

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

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

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

●Keep liquids away from the computer and keyboard.

●Never cover the ventilation slots on the monitor with any type of material.

●Install or enable power management functions of the operating system or other software, including sleep states.

Routine care

General cleaning safety precautions

1.Never use solvents or flammable solutions to clean the computer.

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

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

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

5.Disconnect the keyboard before cleaning it.

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

Cleaning the Computer Case

Follow all safety precautions in General cleaning safety precautions on page 14 before cleaning the computer.

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

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

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

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

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

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

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

Cleaning the keyboard

Follow all safety precautions in General cleaning safety precautions on page 14 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 14.

When cleaning debris from under the keys, review all rules in General cleaning safety precautions on page 14 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 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 fibers or dirt in confined areas. Allow the parts to air dry before reassembly.

Cleaning the monitor

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

●To clean the monitor body follow the procedures in Cleaning the Computer Case on page 14.

Cleaning the mouse

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

●Clean the mouse ball by first 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 14.

Routine care 15

Service considerations

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

Power supply fan

The power supply fan is a variable-speed fan based on the temperature in the power supply.

CAUTION: The cooling fan is always on when the computer is in the “On” mode. The cooling fan is off when the computer is in “Standby,” “Suspend,” or “Off” modes.

You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

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 different 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 finish. U.S. screws have a silver finish 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.

16 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 CPU.

●Avoid dropping drives from any height onto any surface.

●If you are inserting or removing a hard drive, turn off 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 fields 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 fire and chemical burn if the battery is handled improperly. Do not disassemble, crush, puncture, short external contacts, dispose in water or fire, 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.

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 differential	400-700 mV

Drive voltages	3.3 V, 5 V, 12 V

Jumpers for configuring drive	N/A

Data transfer rate	6.0 Gb/s

SATA hard drives 17

SATA hard drive cables

SATA data cable

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

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

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

The SATA data cable is a thin, 7-pin cable designed to transmit data for only a single drive.

SMART ATA drives

The Self Monitoring Analysis and Recording Technology (SMART) ATA drives for the HP Personal Computers have built-in drive failure prediction that warns the user or network administrator of an impending failure or crash of the hard drive. The SMART drive tracks fault prediction and failure indication parameters such as reallocated sector count, spin retry count, and calibration retry count. If the drive determines that a failure is imminent, it generates a fault alert.

Cable management

Always follow good cable management practices when working inside the computer.

●Keep cables away from major heat sources like the heat sink.

●Do not jam cables on top of expansion cards or memory modules. Printed circuit cards like these are not designed to take excessive pressure on them.

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

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

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

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

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

●Never crease a SATA data cable.

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

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

4Removal and replacement procedures: Small Form Factor

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

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

Preparation for disassembly

See Routine care, SATA drive guidelines, and disassembly preparation on page 11 for initial safety procedures.

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

2.Remove all removable media, such as compact discs or USB flash drives, from the computer.

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

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

CAUTION: Turn off 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.

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

NOTE: During disassembly, label each cable as you remove it, noting its position and routing. Keep all screws with the units removed.

Preparation for disassembly 19

Access panel

1.Prepare the computer for disassembly (Preparation for disassembly on page 19).

2.Loosen the thumbscrew on the rear of the computer (1) then slide the panel back (2) and lift if off the computer (3).

To install the access panel, reverse the removal procedure.

20 Chapter 4 Removal and replacement procedures: Small Form Factor

Front bezel

1.Prepare the computer for disassembly (Preparation for disassembly on page 19).

2.Remove the access panel (Access panel on page 20).

3.Lift up the three tabs on the side of the bezel (1), then rotate the bezel off the chassis (2).

To install the front bezel, reverse the removal procedure.

Front bezel 21

Front bezel security

The front bezel can be locked in place by installing a security screw provided by HP. To install the security screw:

1.Prepare the computer for disassembly (Preparation for disassembly on page 19).

2.Remove the access panel (Access panel on page 20).

3.Remove one of the five silver 6-32 standard screws located on top of the drive cage.

4.Install the security screw through the middle front bezel release tab to secure the front bezel in place.

22 Chapter 4 Removal and replacement procedures: Small Form Factor

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