Lenovo ThinkCentre A57e User manual

ThinkCentre
Safety and Warranty Guide
Inside
Important safety information
Information resources
Warranty and other notices
Customer Replaceable Units (CRUs)

ThinkCentre
Safety and Warranty Guide

Note:
Before using this information and the product it supports, be sure to read the following:
vChapter 1, “Important safety information,” on page 7
vChapter 3, “Lenovo Limited Warranty,” on page 27
vChapter 6, “Notices,” on page 41
First Edition (October 2008)
©Copyright Lenovo 2005, 2008.
Portions ©Copyright International Business Machines Corporation 2005.
LENOVO products, data, computer software, and services have been developed
exclusively at private expense and are sold to governmental entities as commercial items
as defined by 48 C.F.R. 2.101 with limited and restricted rights to use, reproduction and
disclosure.
LIMITED AND RESTRICTED RIGHTS NOTICE: If products, data, computer software, or
services are delivered pursuant aGeneral Services Administration ″GSA″contract, use,
reproduction, or disclosure is subject to restrictions set forth in Contract No.
GS-35F-05925.

Contents
Chapter 1. Important safety information ...........9
Conditions that requireimmediate action ............10
General safety guidelines .................10
Service and upgrades .................10
Static electricity prevention ...............11
Power cords and power adapters .............12
Voltage-selection switch.................13
Extension cords and related devices ............13
Plugs and outlets ...................14
External devices ...................14
Batteries ......................14
Heat and product ventilation ...............15
Operating environment .................16
Electrical current safety information .............17
Lithium battery notice ..................17
Modem safety information .................18
Laser compliance statement .................18
Power supply statement ..................19
Products with television tuner options installed ..........20
Note to CATV system installer ...............20
Example of antenna grounding ...............21
Data safety ......................22
Cleaning and maintenance .................23
Using headphones or earphones ...............23
Additional safety information ................24
Chapter 2. Information resources ..............25
Online Books folder ...................25
Lenovo Care......................26
Access Help ......................26
Lenovo Website (http://www.lenovo.com)............26
Recording your computer information .............27
Chapter 3. Lenovo Limited Warranty .............29
Warranty Information ...................33
Suplemento de Garantía para México..............35
Chapter 4. Worldwide telephone list .............37
Chapter 5. Customer Replaceable Units (CRUs) .........41
Chapter 6. Notices ...................43
Export classification notice .................44
©Lenovo 2005, 2008. Portions ©IBM Corp. 2005. 1

Television output notice ..................44
Trademarks ......................44
Electronic emissions notices .................45
Federal Communications Commission (FCC) Declaration of Conformity 45
Industry Canada Class Bemission compliance statement ......46
European Union EMC Directive conformance statement ......46
EU-EMC Directive (2004/108/EC) EN 55022 class BStatement of
Compliance ....................46
Korean Class Bstatement.................47
Japanese VCCI Class Bstatement ..............47
Japanese compliance for products less than or equal to 20 Aper phase 48
Keyboardand mouse compliance statement for Taiwan.......48
Lenovo product service information for Taiwan .........48
Federal Communications Commission (FCC) and telephone company
requirements .....................48
Canadian Department of Communications certification label ......49
Power cordnotice ....................50
Polyvinyl Chloride (PVC) cable and cordnotice ..........52
China substance disclosuretable ...............53
Waste electrical and electronic equipment (WEEE) notices .......53
European Union (EU) WEEE statement ............54
Japanese recycling statement.................54
Collecting and recycling adisused Lenovo computer or monitor ...54
Disposing of aLenovo computer component ..........55
Disposing of disused lithium batteries from Lenovo computers ....55
2Safety and Warranty Guide

Table des matières
Avisaux lecteurs canadiens ...............57
Chapitre 1. Consignes de sécurité .............61
Conditions qui nécessitent une action immédiate .........61
Consignes générales de sécurité ...............63
Maintenance et mises àniveau ..............63
Protection antistatique .................64
Cordons et adaptateurs d’alimentation............65
Sélecteur de tension ..................65
Prolongateurs et dispositifs associés ............66
Fiches et prises ...................66
Périphériques externes .................67
Piles et batteries ...................67
Chaleur et ventilation des produits .............68
Environnement d’exploitation...............69
Informations relatives àla sécurité du courant électrique .......70
Pile au lithium .....................71
Informations relatives au modem ...............72
Conformité aux normes relatives aux appareils àlaser ........72
Instruction concernant le bloc d’alimentation ...........73
Produits disposant de syntoniseurs TV .............73
Remarque àl’intention des installateurs de systèmes CATV .....74
Exemple de mise àla terred’une antenne ...........74
Sécurité des données ...................75
Entretien et maintenance ..................76
Utilisation de casques et d’écouteurs ..............76
Autres consignes de sécurité.................77
Chapitre 2. Sources d’informations..............79
Dossier Online Books ...................79
Lenovo Care......................80
Access Help ......................80
Site Webde Lenovo (http://www.lenovo.com) ..........81
Tableau d’informations ..................81
Chapitre 3. Garantie Lenovo ................83
Informations relatives àla garantie ..............88
Suplemento de Garantía para México..............91
Chapitre 4. Liste de numéros de téléphone pour le monde entier ...93
Chapitre 5. Unités remplaçables par l’utilisateur (CRU).......97
©Lenovo 2005, 2008. Portions ©IBM Corp. 2005. 3

Chapitre 6. Remarques .................99
Restrictions àl’exportation .................100
Consigne relative àla sortie télévision .............100
Marques .......................101
Bruits radioélectriques ...................101
Déclaration de conformité de la Federal Communications Commission
(FCC) ......................101
Avisde conformité àla réglementation d’Industrie Canada pour la classe
B........................102
Avisde conformité àla directive de l’Union européenne ......102
Avisde conformité àla Directive 2004/108/CE du Parlement européen
et du Conseil (EN 55022) pour la classe B..........102
Corée -Avisde conformité pour la classe B...........103
Japon -Avisde conformité aux exigences du Voluntary Control Council
for Interference (VCCI) pour la classe B...........103
Avisde conformité aux normes japonaises pour les produits dont
l’intensité est inférieureou égale à20 Apar phase .......104
Conformité aux normes relatives au clavier et àla souris pour Taïwan104
Taïwan-Informations de maintenance pour les produits Lenovo ...104
Recommandations de la Federal Communications Commission (FCC) et des
entreprises de télécommunications [Etats Unis] .........104
Recommandation d’Industrie Canada .............105
Cordons d’alimentation ..................106
Cordons d’alimentation et câbles sous enveloppe de PVC (chlorurede
polyvinyle)......................108
Directive RoHS pour la Chine ................109
Déchets d’Equipements Electriques et Electroniques (DEEE) ......109
Avisde conformité àla directive DEEE de l’Union Européenne ....110
Japon -Déclaration relative au recyclage.............110
Collecte et recyclage d’un ordinateur ou d’un écran Lenovo usagé ...110
Mise au rebut de composants d’ordinateur Lenovo ........111
Mise au rebut des piles au lithium usagées des ordinateurs Lenovo ..111
4Consignes de sécurité et déclaration de garantie

Inhaltsverzeichnis
Kapitel 1. Wichtige Sicherheitshinweise ...........113
Situationen, die sofortige Maßnahmen erfordern .........113
Allgemeine Sicherheitsrichtlinien ..............115
Service und Upgrades .................115
Statische Aufladung vermeiden ..............116
Netzkabel und Netzteile ................117
Spannungsauswahlschalter ...............118
Verlängerungskabel und verwandte Einheiten .........119
Netzstecker und Steckdosen ...............119
Externe Einheiten...................120
Batterien und Akkus..................120
Erwärmung und Lüftung des Produkts ...........121
Betriebsumgebung ...................122
Sicherheitshinweise zur elektrischen Sicherheit...........123
Hinweis zur Lithiumbatterie.................124
Sicherheitshinweise zu Modems ...............124
Lasersicherheit .....................125
Hinweise zu Netzteilen ..................126
Produkte mit installierter TV-Empfangseinheit...........126
Hinweis an Installationsverantwortliche für Kabel-/CATV-Systeme ...126
Beispiel für die Erdung der Antenne .............127
Datensicherheit .....................128
Reinigung und Wartung ..................129
Verwendung von Kopf- und Ohrhörern .............129
Zusätzliche Sicherheitshinweise................130
Kapitel 2. Informationsressourcen ..............131
Ordner mit Onlinebüchern .................131
Lenovo Care......................132
Access Help ......................132
Die Lenovo Website (http://www.lenovo.com) ..........133
Computerdaten notieren ..................133
Kapitel 3. Lenovo Begrenzte Herstellergarantie .........135
Garantieinformationen...................141
Suplemento de Garantía para México..............144
Kapitel 4. Liste der weltweit gültigen Telefonnummern .......145
Kapitel 5. CRUs (Customer Replaceable Units, durch den Kunden aus-
tauschbare Funktionseinheiten) ..............149
Kapitel 6. Bemerkungen .................151
©Lenovo 2005, 2008. In Teilen ©IBM Corp. 2005. 5

Exportbestimmungen ...................152
Hinweise zur TV-Ausgabe .................152
Marken........................153
Hinweise zur elektromagnetischen Verträglichkeit .........153
FCC-Konformitätserklärung (Federal Communications Commission) 153
Industry Canada Class Bemission compliance statement ......154
EU-Richtlinie zur elektromagnetischen Verträglichkeit .......154
EU-Richtlinie zur elektromagnetischen Verträglichkeit (2004/108/EC) EN
55022 der Klasse B..................154
Federal Communications Commission (FCC) and telephone company
requirements .....................155
Canadian Department of Communications certification label ......156
Hinweise zu Netzkabeln ..................157
Hinweis zu Elektro- und Elektronikaltgeräten (WEEE) ........161
EU-Hinweis zu Elektro- und Elektronikaltgeräten (WEEE) ......161
6Sicherheit und Garantie

Inhoudsopgave
Hoofdstuk 1. Belangrijke veiligheidsvoorschriften ........163
Situaties waarin onmiddellijk handelen vereist is .........163
Algemene veiligheidsrichtlijnen ...............164
Service en upgrades ..................165
Voorkoming van statische elektriciteit ............166
Netsnoeren en voedingsadapters..............166
Voltageschakelaar...................167
Verlengsnoeren en aanverwante apparaten ..........168
Stekkers en stopcontacten ................168
Externe apparatuur ..................169
Batterijen .....................169
Warmteproductie en ventilatie ..............170
Gebruiksomgeving ..................171
Veiligheidsvoorschriften voor de elektriciteit ...........171
Kennisgeving lithiumbatterij.................172
Veiligheidsvoorschriften voor de modem ............173
Verklaring van conformiteit met laserrichtlijnen ..........173
Kennisgeving voedingseenheid ................174
Producten waarin een optionele TV-tuner geïnstalleerdis .......174
Opmerking voor de installateur van het kabel-TV-systeem......175
Voorbeeld van de aarding van een antenne ...........175
Veilig omgaan met gegevens.................176
Reiniging en onderhoud ..................177
Hoofdtelefoons of oortelefoons gebruiken ............177
Aanvullende veiligheidsvoorschriften..............178
Hoofdstuk 2. Informatiebronnen ...............179
Map Online Boeken ...................179
Lenovo Care......................180
Access Help ......................180
Lenovo-website (http://www.lenovo.com) ............181
Computergegevens noteren .................181
Hoofdstuk 3. Lenovo Beperkte Garantie ............183
Informatie over de garantie .................188
Suplemento de Garantía para México..............190
Hoofdstuk 4. Internationale lijst van telefoonnummers .......193
Hoofdstuk 5. Customer Replaceable Units (CRU’s) ........197
Hoofdstuk 6. Kennisgevingen ...............199
Kennisgeving classificatie voor export .............200
©Lenovo 2005, 2008. Gedeelten ©IBM Corp. 2005. 7

Kennisgeving televisie-uitvoer ................200
Handelsmerken .....................201
Elektronische emissie ...................201
Verklaring van de Federal Communications Commission (FCC) ....201
Verklaring van conformiteit met industriële emissierichtlijn Canada
Klasse B......................202
Verklaring van conformiteit met EU-richtlijnen .........202
Kennisgeving over naleving van EU-EMC Directive (2004/108/EC) EN
55022 klasse B....................202
Korea: Kennisgeving Klasse B...............203
Japan: Kennisgeving VCCI-klasse B.............204
Japanse naleving voor producten met maximaal 20 Aper fase ....204
Taiwan: Verklaring van compliantie voor toetsenborden muis ....204
Taiwan: Informatie over Lenovo productservice .........204
Vereisten van de Federal Communications Commission (FCC) en telefoon-
maatschappijen ....................204
Waarmerk van het Canadian Department of Communications .....205
Kennisgevingen voor het netsnoer ...............206
Kennisgeving voor PVC-kabels en -snoeren............208
China -Tabel gevaarlijke stoffen ...............209
WEEE-kennisgevingen (Waste Electrical and Electronic Equipment)....209
WEEE-verklaring voor de Europese Unie (EU)..........210
Recyclingverklaring voor Japan................210
Ophalen en recyclen van een Lenovo-computer of -monitor die niet meer
wordt gebruikt ...................210
Een onderdeel van een Lenovo-computer weggooien .......211
Gebruikte lithiumbatterijen uit een Lenovo-computer weggooien ...211
iv Veiligheid en garantie

Chapter 1. Important safety information
Note
Please read the important safety information first.
This information can help you safely use your desktop or notebook personal
computer. Follow and retain all information included with your computer. The
information in this document does not alter the terms of your purchase
agreement or the Lenovo®Limited Warranty. For more information, refer to
Chapter 3, “Lenovo Limited Warranty,” on page 29.
Customer safety is important. Our products are developed to be safe and
effective. However, personal computers are electronic devices. Power cords,
power adapters, and other features can create potential safety risks that can
result in physical injury or property damage, especially if misused. To reduce
these risks, follow the instructions included with your product, observe all
warnings on the product and in the operating instructions, and review the
information included in this document carefully. By carefully following the
information contained in this document and provided with your product, you
can help protect yourself from hazards and create asafer computer work
environment.
Note: This information includes references to power adapters and batteries. In
addition to notebook computers, some products (such as speakers and
monitors) are shipped with external power adapters. If you have such a
product, this information applies to your product. In addition, computer
products contain acoin-sized internal battery that provides power to the
system clock even when the computer is unplugged, therefore, the battery
safety information applies to all computer products.
Conditions that require immediate action
Products can become damaged due to misuse or neglect. Some product
damage is serious enough that the product should not be used again until it
has been inspected and, if necessary, repaired by an authorized service
provider.
As with any electronic device, pay close attention to the product when it is
turned on. On very rare occasions, you might notice an odor or see apuff of
smoke or sparks vent from your product. Or you might hear sounds like
popping, cracking, or hissing. These conditions might merely mean that an
internal electronic component has failed in asafe and controlled manner. Or,
they might indicate apotential safety issue. However, do not take risks or
attempt to diagnose the situation yourself. Contact the Customer Support
©Lenovo 2005, 2008. Portions ©IBM Corp. 2005. 9

Center for further guidance. For alist of Service and Support phone
numbers, see Chapter 4, “Worldwide telephone list,” on page 37.
Frequently inspect your computer and its components for damage, wear, or
signs of danger. If you have any question about the condition of a
component, do not use the product. Contact the Customer Support Center or
the product manufacturer for instructions on how to inspect the product and
have it repaired, if necessary.
In the unlikely event that you notice any of the following conditions, or if
you have any safety concerns with your product, stop using the product and
unplug it from the power source and telecommunication lines until you can
speak to the Customer Support Center for further guidance.
vPower cords, plugs, power adapters, extension cords, surge protectors, or
power supplies that are cracked, broken, or damaged.
vSigns of overheating, smoke, sparks, or fire.
vDamage to abattery (such as cracks, dents, or creases), discharge from a
battery, or abuildup of foreign substances on the battery.
vAcracking, hissing, or popping sound, or strong odor that comes from the
product.
vSigns that liquid has been spilled or an object has fallen onto the computer
product, the power cord, or power adapter.
vThe computer product, power cord, or power adapter has been exposed to
water.
vThe product has been dropped or damaged in any way.
vThe product does not operate normally when you follow the operating
instructions.
Note: If you notice these conditions with aproduct (such as an extension cord)
that is not manufactured for or by Lenovo, stop using that product until you
can contact the product manufacturer for further instructions, or until you get
asuitable replacement.
General safety guidelines
Always observe the following precautions to reduce the risk of injury and
property damage.
Service and upgrades
Do not attempt to service aproduct yourself unless instructed to do so by the
Customer Support Center or your documentation. Only use aservice provider
who is approved to repair your particular product.
10Safety and Warranty Guide

Note: Some computer parts can be upgraded or replaced by the customer.
Upgrades typically are referred to as options. Replacement parts approved for
customer installation are referred to as Customer Replaceable Units, or CRUs.
Lenovo provides documentation with instructions when it is appropriate for
customers to install options or replace CRUs. You must closely follow all
instructions when installing or replacing parts. The Off state of apower
indicator does not necessarily mean that voltage levels inside aproduct are
zero. Before you remove the covers from aproduct equipped with an ac power
cord, always make sure that the power is turned off and that the product is
unplugged from any power source. For more information on CRUs, refer to the
ThinkCentre Hardware Installation and Replacement Guide for this product. If you
have any questions or concerns, contact the Customer Support Center.
Although there are no moving parts in your computer after the power cord has
been disconnected, the following warnings are required for your safety.
DANGER
Hazardous moving parts. Keep fingers and other body parts away.
CAUTION
Before replacing any CRUs, turn off the computer and wait three to
five minutes to let the computer cool before opening the cover.
Static electricity prevention
Static electricity, although harmless to you, can seriously damage computer
components and options. Improper handling of static-sensitive parts can cause
damage to the part. When you unpack an option or CRU, do not open the
static-protective package containing the part until the instructions direct you to
install it.
Chapter 1. Important safety information 11

When you handle options or CRUs, or perform any work inside the computer,
take the following precautions to avoid static-electricity damage:
vLimit your movement. Movement can cause static electricity to build up
around you.
vAlways handle components carefully. Handle adapters, memory modules,
and other circuit boards by the edges. Never touch exposed circuitry.
vPrevent others from touching components.
vWhen you install astatic-sensitive option or CRU, touch the static-protective
package containing the part to ametal expansion-slot cover or other
unpainted metal surface on the computer for at least two seconds. This
reduces static electricity in the package and your body.
vWhen possible, remove the static-sensitive part from the static-protective
packaging and install the part without setting it down. When this is not
possible, place the static-protective packaging on asmooth, level surface and
place the part on it.
vDo not place the part on the computer cover or other metal surface.
Power cords and power adapters
Use only the power cords and power adapters supplied by the product
manufacturer.
The power cords shall be safety approved. For Germany, it shall be H05VV-F,
3G, 0.75 mm2,or better. For other countries, the suitable types shall be used
accordingly.
Never wrap apower cord around apower adapter or other object. Doing so
can stress the cord in ways that can cause the cord to fray, crack, or crimp.
This can present asafety hazard.
Always route power cords so that they will not be walked on, tripped over, or
pinched by objects.
Protect power cord and power adapters from liquids. For instance, do not
leave your power cord or power adapter near sinks, tubs, toilets, or on floors
that are cleaned with liquid cleansers. Liquids can cause ashort circuit,
particularly if the power cord or power adapter has been stressed by misuse.
Liquids also can cause gradual corrosion of power cord terminals and/or the
connector terminals on apower adapter, which can eventually result in
overheating.
Always connect power cords and signal cables in the correct order and ensure
that all power cord connectors are securely and completely plugged into
receptacles.
12Safety and Warranty Guide

Do not use any power adapter that shows corrosion at the ac input pins or
shows signs of overheating (such as deformed plastic) at the ac input or
anywhere on the power adapter.
Do not use any power cords where the electrical contacts on either end show
signs of corrosion or overheating or where the power cord appears to have
been damaged in any way.
Voltage-selection switch
Some computers are equipped with avoltage-selection switch located near the
power-cord connection point on the computer and some computers do not
have avoltage-selection switch. Before you install your computer or relocate
your computer to another country or region, you must be certain that you
have matched your computer to the voltage available at your electrical outlet.
CAUTION:
You must know the voltage of the electrical connection (outlet) where your
computer will be connected. If you do not know the voltage, contact your
local electric company or refer to official Web sites or other literature for
travelers to the country or region where you are located.
If your computer has avoltage-selection switch, you must set the switch to
match the voltage available at your electrical outlet. Setting the
voltage-selection switch incorrectly will cause the computer to malfunction and
might cause permanent damage to the computer. Do not connect the computer
to an electrical outlet until you have verified that the voltage-selection switch
setting matches the voltage available at the electrical outlets.
If your computer does not have avoltage-selection switch, inspect the
voltage-rating label on the bottom of the computer and note the following:
vIf the voltage-rating label shows arange of either ″100-127 V″or ″200-240 V,″
you must ensure that the voltage provided at the electrical outlet matches
the voltage rating on the computer label. If it does not match, do not
attempt to connect the computer to the electrical outlet, unless an external
device such as avoltage-converting transformer is used.
vIf the voltage-rating label shows adual range of ″100-127 V″and ″200-240
V,″this signifies that the computer is suitable for worldwide operation and
the computer will automatically adjust to the voltage at the electrical outlet
regardless of the country or region where the computer is being connected.
Extension cords and related devices
Ensure that extension cords, surge protectors, uninterruptible power supplies,
and power strips that you use are rated to handle the electrical requirements of
the product. Never overload these devices. If power strips are used, the load
Chapter 1. Important safety information 13

should not exceed the power strip input rating. Consult an electrician for more
information if you have questions about power loads, power requirements, and
input ratings.
Plugs and outlets
If areceptacle (power outlet) that you intend to use with your computer
equipment appears to be damaged or corroded, do not use the outlet until it is
replaced by aqualified electrician.
Do not bend or modify the plug. If the plug is damaged, contact the
manufacturer to obtain areplacement.
Do not share an electrical outlet with other home or commercial appliances
that draw large amounts of electricity; otherwise, unstable voltage might
damage your computer, data, or attached devices.
Some products are equipped with athree-pronged plug. This plug fits only
into agrounded electrical outlet. This is asafety feature. Do not defeat this
safety feature by trying to insert it into anon-grounded outlet. If you cannot
insert the plug into the outlet, contact an electrician for an approved outlet
adapter or to replace the outlet with one that enables this safety feature. Never
overload an electrical outlet. The overall system load should not exceed 80
percent of the branch circuit rating. Consult an electrician for more information
if you have questions about power loads and branch circuit ratings.
Be sure that the power outlet you are using is properly wired, easily accessible,
and located close to the equipment. Do not fully extend power cords in away
that will stress the cords.
Be sure that the power outlet provides the correct voltage and current for the
product you are installing.
Carefully connect and disconnect the equipment from the electrical outlet.
External devices
Do not connect or disconnect any external device cables other than USB and
1394 cables while the computer power is on; otherwise, you might damage
your computer. To avoid possible damage to attached devices, wait at least five
seconds after the computer is shut down to disconnect external devices.
Batteries
All personal computers manufactured by Lenovo contain anon-rechargeable
coin cell battery to provide power to the system clock. In addition, many
mobile products, such as notebook computers, utilize arechargeable battery
pack to provide system power when in portable mode. Batteries supplied by
14Safety and Warranty Guide

Lenovo for use with your product have been tested for compatibility and
should only be replaced with approved parts.
Never attempt to open or service any battery. Do not crush, puncture, or
incinerate batteries or short circuit the metal contacts. Do not expose the
battery to water or other liquids. Only recharge the battery pack strictly
according to instructions included in the product documentation.
Battery abuse or mishandling can cause the battery to overheat, which can
cause gasses or flame to “vent” from the battery pack or coin cell. If your
battery is damaged, or if you notice any discharge from your battery or the
buildup of foreign materials on the battery leads, stop using the battery and
obtain areplacement from the battery manufacturer.
Batteries can degrade when they are left unused for long periods of time. For
some rechargeable batteries (particularly Lithium Ion batteries), leaving a
battery unused in adischarged state could increase the risk of abattery short
circuit, which could shorten the life of the battery and can also pose asafety
hazard. Do not let rechargeable Lithium-Ion batteries completely discharge or
store these batteries in adischarged state.
Heat and product ventilation
Computers, AC power adapters, and many accessories can generate heat when
turned on and when batteries are charging. Always follow these basic
precautions:
vDo not leave your computer, AC power adapter, or accessories in contact
with your lap or any part of your body for an extended period when the
products are functioning or when the battery is charging. Your computer, AC
power adapter, and many accessories produce some heat during normal
operation. Extended contact with the body could cause discomfort or,
potentially, askin burn.
vDo not charge the battery or operate your computer, AC power adapter, or
accessories near flammable materials or in explosive environments.
vVentilation slots, fans, and heat sinks are provided with the product for
safety, comfort, and reliable operation. These features might inadvertently
become blocked by placing the product on abed, sofa, carpet, or other
flexible surface. Never block, cover, or disable these features.
Inspect your desktop computer for dust accumulation at least once every three
months. Before inspecting your computer, turn off the power and unplug the
computer’s power cord from the electrical outlet; then remove any dust from
vents and perforations in the bezel. If you notice external dust accumulation,
then examine and remove dust from the inside of the computer including heat
sink inlet fins, power supply vents, and fans. Always turn off and unplug the
computer before opening the cover. If possible, avoid operating your computer
Chapter 1. Important safety information 15

within two feet of high-traffic areas. If you must operate your computer in or
near ahigh-traffic area, inspect and, if necessary, clean your computer more
frequently.
For your safety and to maintain optimum computer performance, always
follow these basic precautions with your desktop computer:
vKeep the cover closed whenever the computer is plugged in.
vRegularly inspect the outside of the computer for dust accumulation.
vRemove dust from vents and any perforations in the bezel. More frequent
cleanings might be required for computers in dusty or high-traffic areas.
vDo not restrict or block any ventilation openings.
vDo not store or operate your computer inside furniture, as this might
increase the risk of overheating.
vAirflow temperatures into the computer should not exceed 35° C(95° F).
vDo not use non-desktop air filtration devices.
Operating environment
The optimal environment in which to use your computer is 10°C-35°C
(50°F-95°F) with humidity ranging between 35% and 80%. If your computer is
stored or transported in temperatures less than 10°C (50°F), allow the cold
computer to rise slowly to an optimal operating temperature of 10°C-35°C
(50°F-95°F) before use. This process could take two hours in extreme
conditions. Failure to allow your computer to rise to an optimal operating
temperature before use could result in irreparable damage to your computer.
If possible, place your computer in awell-ventilated and dry area without
direct exposure to sunshine.
Keep electrical appliances such as an electric fan, radio, high-powered
speakers, air conditioner, and microwave oven away from your computer
because the strong magnetic fields generated by these appliances can damage
the monitor and data on the hard disk drive.
Do not place any beverages on top of or beside the computer or other attached
devices. If liquid is spilled on or in the computer or an attached device, ashort
circuit or other damage might occur.
Do not eat or smoke over your keyboard. Particles that fall into your keyboard
can cause damage.
16Safety and Warranty Guide