Hp 402 G1 Small Form Factor Pc Reference Guide

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Hardware Reference Guide
HP 402 G1 Small Form Factor Business PC

© Copyright 2014 Hewlett-Packard
Development Company, L.P. The
information contained herein is subject to
change without notice.
Microsoft® and Windows® are U.S.
registered trademarks of Microsoft
Corporation.
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 Hewlett-Packard Company.
Hardware Reference Guide
HP 402 G1 Small Form Factor Business PC
First Edition: April 2014
Document part number: 764145-001

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. This 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
This guide provides basic information for upgrading the HP Business PC.
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

About This Book

Table of contents
1 Product features ................................................................................................................................................ 1
Standard configuration features ........................................................................................................... 1
Front panel components ....................................................................................................................... 1
Rear panel components ....................................................................................................................... 2
Serial number location .......................................................................................................................... 2
2 Hardware upgrades .......................................................................................................................................... 3
Serviceability features .......................................................................................................................... 3
Warnings and cautions ......................................................................................................................... 3
Removing the computer access panel ................................................................................................. 4
Replacing the computer access panel ................................................................................................. 5
Changing from desktop to tower configuration ..................................................................................... 5
Installing additional memory ................................................................................................................. 6
DIMMs ................................................................................................................................. 6
DDR3-SDRAM DIMMs ........................................................................................................ 6
Populating DIMM sockets .................................................................................................... 6
Installing DIMMs .................................................................................................................. 7
Removing or installing an expansion card ............................................................................................ 9
Installing and removing drives ............................................................................................................ 11
Removing a slim optical disc drive ..................................................................................... 11
Installing a slim optical disc drive ....................................................................................... 14
Removing and replacing a 3.5-inch hard drive .................................................................. 16
Installing a security lock ..................................................................................................................... 21
Cable lock .......................................................................................................................... 21
Padlock .............................................................................................................................. 21
Appendix A Battery replacement ....................................................................................................................... 22
Appendix B Electrostatic discharge ................................................................................................................... 25
Preventing electrostatic damage ........................................................................................................ 25
Grounding methods ............................................................................................................................ 25
Appendix C Computer operating guidelines, routine care and shipping preparation ......................................... 26
Computer operating guidelines and routine care ............................................................................... 26
Optical disc drive precautions ............................................................................................................ 27
Operation ........................................................................................................................... 27
v

Cleaning ............................................................................................................................. 27
Safety ................................................................................................................................. 27
Shipping preparation .......................................................................................................................... 27
Index ................................................................................................................................................................... 28

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.

Front panel components

Drive configuration may vary by model.
1

Slim optical disc drive (optional)

USB 2.0 Port (black)

Hard Drive Activity Light

Microphone Connector

Dual-State Power Button

Headphone Connector

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.

Standard configuration features

Rear panel components

Power Cord Connector

DVI-D Monitor Connector (white)

Serial Connector (green)

VGA Monitor Connector (blue)

RJ-45 Network Connector

USB 2.0 Ports (black)

PCI x16 Expansion Card Slot Cover

USB 3.0 Ports (blue)

PCI Expansion Slot Covers

Microphone Connector (pink)

PS/2 Mouse Connector (green)

Line-Out Connector for powered audio
devices (green)

PS/2 Keyboard Connector (purple)

Line-In Audio Connector (blue)

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.

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.

Chapter 1 Product features

Hardware upgrades

Serviceability features
The computer includes features that make it easy to upgrade and service. No tools are needed for
most of the installation procedures described in this chapter.

Warnings and cautions
Before performing upgrades be sure to carefully read all of the applicable instructions, cautions, and
warnings in this guide.
WARNING! To reduce the risk of personal injury from electrical shock, hot surfaces, or fire:
Disconnect the power cord from the wall outlet and allow the internal system components to cool
before touching.
Do not plug telecommunications or telephone connectors into the network interface controller (NIC)
receptacles.
Do not disable the power cord grounding plug. The grounding plug is an important safety feature.
Plug the power cord in a grounded (earthed) outlet that is easily accessible at all times.
To reduce the risk of serious injury, read the Safety & Comfort Guide. It describes proper workstation,
setup, posture, and health and work habits for computer users, and provides important electrical and
mechanical safety information. This guide is located on the Web at http://www.hp.com/ergo.
WARNING! Energized and moving parts inside.
Disconnect power to the equipment before removing the enclosure.
Replace and secure the enclosure before re-energizing the equipment.
CAUTION: Static electricity can damage the electrical components of the computer or optional
equipment. Before beginning these procedures, ensure that you are discharged of static electricity by
briefly touching a grounded metal object. See Electrostatic discharge on page 25 for more
information.
When the computer is plugged into an AC power source, voltage is always applied to the system
board. You must disconnect the power cord from the power source before opening the computer to
prevent damage to internal components.

Serviceability features

Removing the computer access panel
To access internal components, you must remove the access panel:
1.

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

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

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

Disconnect the power cord from the power outlet and disconnect any external devices.
CAUTION: 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. You must disconnect the power cord
to avoid damage to the internal components of the computer.

Unscrew the two screws on the rear of the computer.

Slide the panel back (1) and lift if off the computer (2).

Chapter 2 Hardware upgrades

Replacing the computer access panel
1.

Place the panel on the computer (1), and then slide it forward (2).

Fasten the two screws (3) to secure the panel in place.

Changing from desktop to tower configuration
The computer can be used in either a horizontal or a tower orientation.
1.

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

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

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

Position the computer so that its left side is down and the optical disc drive is up. Set the
computer down on the left side.
The right side, with the optical disc drive, should be uppermost.

Replacing the computer access panel

Reconnect the power cord and any external devices, then turn on the computer.
NOTE: Ensure at least 10.2 centimeters (4 inches) of space on all sides of the computer
remains clear and free of obstructions.

Lock any security devices that were disengaged when the access panel was removed.

Installing additional memory
The computer comes with double data rate 3 synchronous dynamic random access memory (DDR3SDRAM) dual inline memory modules (DIMMs).

DIMMs
The memory sockets on the system board can be populated with up to two industry-standard DIMMs.
These memory sockets are populated with at least one preinstalled DIMM. To achieve the maximum
memory support, you can populate the system board with up to 16-GB of memory configured in a
high-performing dual channel mode.

DDR3-SDRAM DIMMs
For proper system operation, the DDR3-SDRAM DIMMs must be:
●

industry-standard 240-pin

●

unbuffered non-ECC PC3-12800 DDR3-1600 MHz-compliant

●

1.35 volt or 1.5 volt DDR3/DDR3L-SDRAM DIMMs

The DDR3-SDRAM DIMMs must also:
●

support CAS latency 11 DDR3 1600 MHz (11-11-11 timing)

●

contain the mandatory JEDEC SPD information

In addition, the computer supports:
●

512-Mbit, 1-Gbit, and 2-Gbit non-ECC memory technologies

●

single-sided and double-sided DIMMs

●

DIMMs constructed with x8 and x16 DDR devices; DIMMs constructed with x4 SDRAM are not
supported

NOTE:

The system will not operate properly if you install unsupported DIMMs.

Populating DIMM sockets
There are two DIMM sockets on the system board, with one socket per channel. The sockets are
labeled DIMM1 and DIMM2. Socket DIMM1 operates in memory channel B. Socket DIMM2 operates
in memory channel A.
The system will automatically operate in single channel mode, dual channel mode, or flex mode,
depending on how the DIMMs are installed.
NOTE: Single channel and unbalanced dual channel memory configurations will result in inferior
graphics performance.

Chapter 2 Hardware upgrades

●

The system will operate in single channel mode if the DIMM sockets are populated in one
channel only.

●

The system will operate in a higher-performing dual channel mode if the memory capacity of the
DIMM in Channel A is equal to the memory capacity of the DIMM in Channel B.

●

The system will operate in flex mode if the memory capacity of the DIMM in Channel A is not
equal to the memory capacity of the DIMM in Channel B. In flex mode, the channel populated
with the least amount of memory describes the total amount of memory assigned to dual
channel and the remainder is assigned to single channel. If one channel will have more memory
than the other, the larger amount should be assigned to Channel A.

●

In any mode, the maximum operational speed is determined by the slowest DIMM in the system.

Installing DIMMs
CAUTION: You must disconnect the power cord and wait approximately 30 seconds for the power
to drain before adding or removing memory modules. Regardless of the power-on state, voltage is
always supplied to the memory modules as long as the computer is plugged into an active AC outlet.
Adding or removing memory modules while voltage is present may cause irreparable damage to the
memory modules or system board.
The memory module sockets have gold-plated metal contacts. When upgrading the memory, it is
important to use memory modules with gold-plated metal contacts to prevent corrosion and/or
oxidation resulting from having incompatible metals in contact with each other.
Static electricity can damage the electronic components of the computer or optional cards. Before
beginning these procedures, ensure that you are discharged of static electricity by briefly touching a
grounded metal object. For more information, refer to Electrostatic discharge on page 25.
When handling a memory module, be careful not to touch any of the contacts. Doing so may damage
the module.
1.

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

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

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

Disconnect the power cord from the power outlet and disconnect any external devices.
CAUTION: You must disconnect the power cord and wait approximately 30 seconds for the
power to drain before adding or removing memory modules. Regardless of the power-on state,
voltage is always supplied to the memory modules as long as the computer is plugged into an
active AC outlet. Adding or removing memory modules while voltage is present may cause
irreparable damage to the memory modules or system board.

Remove the computer access panel.
WARNING! To reduce risk of personal injury from hot surfaces, allow the internal system
components to cool before touching.

Installing additional memory

Locate the DIMM sockets.

Open both latches of the memory module socket (1), and insert the memory module into the
socket (2).

NOTE: A memory module can be installed in only one way. Match the notch on the module
with the tab on the memory socket.
For maximum performance, populate the sockets so that the memory capacity is spread as
equally as possible between Channel A and Channel B. Refer to Populating DIMM sockets
on page 6 for more information.
8.

Push the module down into the socket, ensuring that the module is fully inserted and properly
seated. Make sure the latches are in the closed position (3).

Repeat steps 7 and 8 to install an additional module.

10. Replace the access panel.
11. Reconnect the power cord and turn on the computer.
12. Lock any security devices that were disengaged when the access panel was removed.

Chapter 2 Hardware upgrades

The computer should automatically recognize the additional memory the next time you turn on the
computer.

Removing or installing an expansion card
The computer has one PCI Express x1 expansion slot, one PCI Express x16 expansion slot, and two
PCI expansion slots.
NOTE:

The PCI Express slots support only low profile cards.

You can install a PCI Express x1, x4, x8, or x16 expansion card in the PCI Express x16 slot.
For dual graphics card configurations, the first (primary) card must be installed in the PCI Express
x16 slot.
To remove, replace, or add an expansion card:
1.

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

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

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

Remove the computer access panel.

Locate the correct vacant expansion socket on the system board and the corresponding
expansion slot on the back of the computer chassis.

Rotate the slot cover retention latch on the rear of the chassis to the open position.

Before installing an expansion card, remove the expansion slot cover or the existing expansion
card.
NOTE: Before removing an installed expansion card, disconnect any cables that may be
attached to the expansion card.

Removing or installing an expansion card

If you are installing an expansion card in a vacant PCI x1 socket or a PCI socket, push out
the appropriate expansion slot cover on the back of the chassis.

If you are installing an expansion card in a vacant PCI x16 socket, remove the appropriate
expansion slot cover on the back of the chassis. Pull the slot cover straight up then away
from the inside of the chassis.

If you are removing a PCI Express x1 card or a PCI card, hold the card at each end, and
carefully rock it back and forth until the connectors pull free from the socket. Pull the
expansion card straight up from the socket then away from the inside of the chassis to
release it from the chassis frame. Be sure not to scrape the card against the other
components.

If you are removing a PCI Express x16 card, pull the retention arm on the back of the
expansion socket away from the card and carefully rock the card back and forth until the
connectors pull free from the socket. Pull the expansion card straight up from the socket
then away from the inside of the chassis to release it from the chassis frame. Be sure not to
scrape the card against the other components.

Store the removed card in anti-static packaging.

10. If you are not installing a new expansion card in the PCI x16 expansion slot, install the
expansion slot cover to close the open slot.
CAUTION: After removing an expansion card, you must replace it with a new card or
expansion slot cover for proper cooling of internal components during operation.
11. To install a new expansion card, hold the card just above the expansion socket on the system
board then move the card toward the rear of the chassis so that the bracket on the card is
aligned with the open slot on the rear of the chassis. Press the card straight down into the
expansion socket on the system board.
NOTE: When installing an expansion card, press firmly on the card so that the whole connector
seats properly in the expansion card slot.
12. Rotate the slot cover retention latch back in place to secure the expansion card.
13. Connect external cables to the installed card, if needed. Connect internal cables to the system
board, if needed.
14. Replace the computer access panel.
15. Reconnect the power cord and turn on the computer.
16. Lock any security devices that were disengaged when the access panel was removed.
17. Reconfigure the computer, if necessary.

Chapter 2 Hardware upgrades

Installing and removing drives
When installing drives, follow these guidelines:
●

The Serial ATA (SATA) hard drive must be connected to the SATA connector on the system
board labeled SATA1.

●

Connect an optical disc drive to the SATA connector on the system board labeled SATA2.

●

The power cable for the drives is a dual-headed cable coming from the power supply. The first
connector is routed to the hard drive and the second connector is routed to the slim optical disc
drive.

CAUTION:

To prevent loss of work and damage to the computer or drive:

If you are inserting or removing a drive, shut down the operating system properly, turn off the
computer, and unplug the power cord. Do not remove a drive while the computer is on or in standby
mode.
Before handling a drive, ensure that you are discharged of static electricity. While handling a drive,
avoid touching the connector. For more information about preventing electrostatic damage, refer to
Electrostatic discharge on page 25.
Handle a drive carefully; do not drop it.
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.
If a drive must be mailed, place the drive in a bubble-pack mailer or other protective packaging and
label the package “Fragile: Handle With Care.”

Removing a slim optical disc drive
CAUTION:
computer.

All removable media should be taken out of a drive before removing the drive from the

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

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

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

Remove the computer access panel.

Installing and removing drives

Disconnect the power cable and data cable from the rear of the optical disc drive.
CAUTION: When removing the cables, pull the tab or connector instead of the cable itself to
avoid damaging the cable.

Unfasten the screw securing the optical disc drive cage to the chassis.

Retain the screw.

Press the both sides optical disk drive latch to release the optical disc drive cage and slide the
cage away from the edge of the chassis.

Lift the optical disc drive cage out of the chassis.

Chapter 2 Hardware upgrades

10. Open the latch on the side of the optical disc drive cage.

11. Push the optical disc drive out through the front of the cage.

Installing and removing drives

Installing a slim optical disc drive
1.

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

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

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

Remove the computer access panel.

Be sure both the optical disc drive and the cage are right side up and slide the rear of the optical
disc drive into through the front of the drive cage.

When the optical disc drive is positioned correctly, close the latch on the side of the drive cage.
IMPORTANT: Be sure the latch has engaged properly by moving or attempting to move the
optical disc drive in the drive cage. If the optical disc drive can be moved, do not open the
bracket. Instead, slide the optical disc drive within the cage until you hear the click of the bracket
engaging and you can no longer move the optical disc drive. When the optical disc drive cannot
be moved, the latch has engaged properly.

Chapter 2 Hardware upgrades

Align the optical disc drive above the hard drive with the disc tray opening toward the front of the
chassis. Lower the optical disc drive onto the hard drive and next to the power supply.

Align the latch on the front edge of the optical disc drive cage with the slots on the front edge of
the chassis. Hold both sides of the latch down and slide the drive cage forward until the latch
engages.

10. Fasten the screw to secure the optical disc drive cage to the chassis.

11. Connect the power and data cables to the rear of the optical disc drive.

Installing and removing drives

12. Connect the opposite end of the data cable to the SATA2 connector on the system board.

13. Replace the computer access panel.
14. Reconnect the power cord and any external devices, then turn on the computer.
15. Lock any security devices that were disengaged when the access panel was removed.

Removing and replacing a 3.5-inch hard drive
NOTE: Before you remove the old hard drive, be sure to back up the data from the old hard drive so
that you can transfer the data to the new hard drive.
1.

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

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

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

Remove the computer access panel.

Remove the slim optical disc drive. For instructions, go to Removing a slim optical disc drive
on page 11.

Chapter 2 Hardware upgrades

Disconnect the power cable and data cable from the back of the hard drive.

Press the tab to disengage the latch securing the hard drive in place.

Slide the hard drive away from the edge of the chassis to disengage the hard drive cage, and
then lift it out of the chassis.

10. Open the latch on the side of the hard drive cage.

Installing and removing drives

11. Remove the two screws from the side of the hard drive cage, and then slide the hard drive out of
the cage.

Retain the screws to use on the new hard drive.
12. Slide the new hard drive all the way into the hard drive cage.
Be sure the hard drive is positioned properly. The latch tab that secured the hard drive cage to
the chassis is on the bottom side of the drive cage. The bottom of the hard drive should be on
the same side as the tab and the connectors should be visible on the opposite end from the tab.
13. Close the latch on the side of the hard drive cage.
Be sure the latch is engaged by attempting to move the hard drive within the cage. If it moves,
slide the hard drive to and from the end of the cage until the latch engages.

14. Fasten the two screws in the other side of the hard drive cage to secure the hard drive in the
cage.

Chapter 2 Hardware upgrades

15. Hold the hard drive cage with the connectors next to the power supply and align the openings in
the cage bottom with the raised clips on the bottom of the chassis.

16. Set the cage down and slide it left to engage the clips on the chassis beneath the cage.
Be sure the cage latch slides over and engages the chassis tab to lock the hard drive cage in
place.

17. Connect the power cable and data cable to the back of the hard drive.

Installing and removing drives

18. Connect the opposite end of the data cable to the SATA1 connector on the system board.

19. Replace the slim optical disc drive. For instructions, go to Installing a slim optical disc drive
on page 14.
20. Replace the access panel.
21. Reconnect the power cord and turn on the computer.
22. Lock any security devices that were disengaged when the access panel was removed.

Chapter 2 Hardware upgrades

Installing a security lock
The security locks in the following sections can be used to secure the computer.

Cable lock
The cable lock can be used to secure the computer.

Padlock
A padlock can be used to secure the access panel to the computer.

Installing a security lock

Battery replacement
The battery that comes with the computer provides power to the real-time clock. When replacing the
battery, use a battery equivalent to the battery originally installed in the computer. The computer
comes with a 3-volt lithium coin cell battery.
WARNING! The computer contains an internal lithium manganese dioxide battery. There is a risk of
fire and burns if the battery is not handled properly. To reduce the risk of personal injury:
Do not attempt to recharge the battery.
Do not expose to temperatures higher than 60°C (140ºF).
Do not disassemble, crush, puncture, short external contacts, or dispose of in fire or water.
Replace the battery only with the HP spare designated for this product.
CAUTION: Before replacing the battery, it is important to back up the computer CMOS settings.
When the battery is removed or replaced, the CMOS settings will be cleared.
Static electricity can damage the electronic components of the computer or optional equipment.
Before beginning these procedures, ensure that you are discharged of static electricity by briefly
touching a grounded metal object.
NOTE: The lifetime of the lithium battery can be extended by plugging the computer into a live AC
wall socket. The lithium battery is only used when the computer is NOT connected to AC power.
HP encourages customers to recycle used electronic hardware, HP original print cartridges, and
rechargeable batteries. For more information about recycling programs, go to http://www.hp.com/
recycle.
1.

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

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

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

Remove the computer access panel.

Locate the battery and battery holder on the system board.
NOTE: On some computer models, it may be necessary to remove an internal component to
gain access to the battery.

Depending on the type of battery holder on the system board, complete the following instructions
to replace the battery.
Type 1
a.

Lift the battery out of its holder.

Appendix A Battery replacement

Slide the replacement battery into position, positive side up. The battery holder
automatically secures the battery in the proper position.

Type 2
a.

To release the battery from its holder, squeeze the metal clamp that extends above one
edge of the battery. When the battery pops up, lift it out (1).

To insert the new battery, slide one edge of the replacement battery under the holder’s lip
with the positive side up. Push the other edge down until the clamp snaps over the other
edge of the battery (2).

Type 3
a.

Pull back on the clip (1) that is holding the battery in place, and remove the battery (2).

Insert the new battery and position the clip back into place.

NOTE: After the battery has been replaced, use the following steps to complete this procedure.
8.

Replace the computer access panel.

Plug in the computer and turn on power to the computer.

10. Reset the date and time, your passwords, and any special system setups using Computer
Setup.
11. Lock any security devices that were disengaged when the computer access panel was removed.

Appendix A Battery replacement

Electrostatic discharge
A discharge of static electricity from a finger or other conductor may damage system boards or other
static-sensitive devices. This type of damage may reduce the life expectancy of the device.

Preventing electrostatic damage
To prevent electrostatic damage, observe the following precautions:
●

Avoid hand contact by transporting and storing products in static-safe containers.

●

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

●

Place parts on a grounded surface before removing them from their containers.

●

Avoid touching pins, leads, or circuitry.

●

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

Grounding methods
There are several methods for grounding. Use one or more of the following methods when handling
or installing electrostatic-sensitive parts:
●

Use a wrist strap connected by a ground cord to a grounded workstation or computer chassis.
Wrist straps are flexible straps with a minimum of 1 megohm +/- 10 percent resistance in the
ground cords. To provide proper ground, wear the strap snug against the skin.

●

Use heelstraps, toestraps, or bootstraps at standing workstations. Wear the straps on both feet
when standing on conductive floors or dissipating floor mats.

●

Use conductive field service tools.

●

Use a portable field service kit with a folding static-dissipating work mat.

If you do not have any of the suggested equipment for proper grounding, contact an HP authorized
dealer, reseller, or service provider.
NOTE: For more information on static electricity, contact an HP authorized dealer, reseller, or
service provider.

Preventing electrostatic damage

Computer operating guidelines, routine
care and shipping preparation

Computer operating guidelines and routine care
Follow these guidelines to properly set up and care for the computer and monitor:

●

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.

●

Never operate the computer with the access panel or any of the expansion card slot covers
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.

●

Turn off the computer before you do either of the following:
◦

Wipe the exterior of the computer with a soft, damp cloth as needed. Using cleaning
products may discolor or damage the finish.

◦

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.

Appendix C Computer operating guidelines, routine care and shipping preparation

Optical disc drive precautions
Be sure to observe the following guidelines while operating or cleaning the optical disc drive.

Operation
●

Do not move the drive during operation. This may cause it to malfunction during reading.

●

Avoid exposing the drive to sudden changes in temperature, as condensation may form inside
the unit. If the temperature suddenly changes while the drive is on, wait at least one hour before
you turn off the power. If you operate the unit immediately, it may malfunction while reading.

●

Avoid placing the drive in a location that is subject to high humidity, extreme temperatures,
mechanical vibration, or direct sunlight.

Cleaning
●

Clean the panel and controls with a soft, dry cloth or a soft cloth lightly moistened with a mild
detergent solution. Never spray cleaning fluids directly on the unit.

●

Avoid using any type of solvent, such as alcohol or benzene, which may damage the finish.

Safety
If any object or liquid falls into the drive, immediately unplug the computer and have it checked by an
authorized HP service provider.

Shipping preparation
Follow these suggestions when preparing to ship the computer:
1.

Back up the hard drive files to an external storage device. Be sure that the backup media is not
exposed to electrical or magnetic impulses while stored or in transit.
NOTE: The hard drive locks automatically when the system power is turned off.

Remove and store all removable media.

Turn off the computer and external devices.

Disconnect the power cord from the electrical outlet, then from the computer.

Disconnect the system components and external devices from their power sources, then from
the computer.
NOTE: Ensure that all boards are seated properly and secured in the board slots before
shipping the computer.

Pack the system components and external devices in their original packing boxes or similar
packaging with sufficient packing material to protect them.

Optical disc drive precautions

Index
A
access panel
removal 4
replacement 5

L
locks
cable lock 21

B
battery replacement 22
C
computer operating guidelines

D
DIMMs. See memory
drives
cable connections 11
installation 11
E
electrostatic discharge, preventing
damage 25
expansion card
installation 9
removal 9
F
front panel components

H
hard drive (3.5-inch)
installation 16
removal 16
I
installation guidelines 3
installing
3.5-inch hard drive 16
battery 22
computer access panel 5
drive cables 11
expansion card 9
memory 6
optical disc drive 14

Index

M
memory
installation 6, 7
socket population 6
specifications 6
O
optical disc drive
cleaning 27
installation 14
precautions 27
removal 11
P
product ID location

R
rear panel components 2
removing
3.5-inch hard drive 16
battery 22
computer access panel 4
expansion card 9
optical disc drive 11
S
security
cable lock 21
padlock 21
serial number location 2
shipping preparation 27
specifications
memory 6
T
tower conversion 5
V
ventilation guidelines 26

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Hp 402 G1 Small Form Factor Pc Reference Guide

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