Lenovo ThinkStation P520 User manual

P520 User Guide
Machine Types: 30BE, 30BF, and 30BQ

Note: Before using this information and the product it supports, be sure to read and understand the “ ead
this first: Important safety information” on page v and Appendix G “Notices” on page 157.
First Edition (January 2018)
© Copyright enovo 2018.
LIMITED AND EST ICTED IGHTS NOTICE: If data or software is delivered pursuant to a General Services
Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-
35F-05925.

Contents
Read this first: Important safety
information . . . . . . . . . . . . . . . . v
Before using this manual . . . . . . . . . . . . v
Service and upgrades . . . . . . . . . . . . . v
Static electricity prevention . . . . . . . . . . . vi
Power cords and power adapters . . . . . . . . . vi
Extension cords and related devices. . . . . . . . vii
Plugs and outlets . . . . . . . . . . . . . . . vii
External devices . . . . . . . . . . . . . . . vii
Heat and product ventilation . . . . . . . . . . . vii
Computer placement notices . . . . . . . . . viii
Operating environment . . . . . . . . . . . . viii
Laser compliance statement . . . . . . . . . . . ix
Hazardous energy statement . . . . . . . . . . ix
Lithium coin-cell battery notice . . . . . . . . . . ix
Using earphones, headphones, or a headset . . . . x
Cleaning and maintenance . . . . . . . . . . . xi
Chapter 1. Product overview . . . . . . 1
Hardware locations . . . . . . . . . . . . . . 1
Front view . . . . . . . . . . . . . . . . 1
ear view . . . . . . . . . . . . . . . . 3
Computer components . . . . . . . . . . . 6
Parts on the system board . . . . . . . . . . 7
Internal storage drives . . . . . . . . . . . 9
Machine type and model label . . . . . . . 11
Computer features. . . . . . . . . . . . . . 11
Computer specifications . . . . . . . . . . . 14
Programs . . . . . . . . . . . . . . . . . 15
Accessing a program on your computer . . . 15
Installing a program that is ready to be
installed (Windows 7 only) . . . . . . . . . 16
An introduction to Lenovo programs . . . . . 16
Chapter 2. Using your computer . . . 19
egistering your computer . . . . . . . . . . 19
Setting the computer volume . . . . . . . . . 19
Using a disc . . . . . . . . . . . . . . . . 19
Guidelines about using the optical drive . . . 19
Handling and storing a disc . . . . . . . . 19
Playing and removing a disc . . . . . . . . 20
ecording a disc . . . . . . . . . . . . 20
Connecting to a network . . . . . . . . . . . 21
Chapter 3. You and your computer . . 23
Arranging your workspace . . . . . . . . . . 23
Glare and lighting . . . . . . . . . . . . 23
Air circulation . . . . . . . . . . . . . . 23
Electrical outlet locations and cable lengths . . 23
Comfort . . . . . . . . . . . . . . . . 23
Accessibility information . . . . . . . . . . . 24
Cleaning your computer . . . . . . . . . . . 27
Maintenance . . . . . . . . . . . . . . . . 27
Basic maintenance tips . . . . . . . . . . 27
Good maintenance practices . . . . . . . . 28
Keeping your computer current . . . . . . . 28
Moving your computer . . . . . . . . . . . . 29
Chapter 4. Security . . . . . . . . . . 31
Locking your computer . . . . . . . . . . . . 31
Locking the computer cover . . . . . . . . 31
Attaching a Kensington-style cable lock . . . 32
Viewing and changing security settings in the
Setup Utility program . . . . . . . . . . . . 32
Using passwords and Windows accounts . . . . 33
Using fingerprint authentication . . . . . . . . 33
Using the cover presence switch . . . . . . . . 33
Using firewalls . . . . . . . . . . . . . . . 34
Protecting data against viruses . . . . . . . . . 34
Using the Smart USB Protection function . . . . . 34
Computrace Agent software embedded in
firmware. . . . . . . . . . . . . . . . . . 35
Trusted Platform Module (TPM). . . . . . . . . 35
Intel BIOS guard . . . . . . . . . . . . . . 35
Chapter 5. Advanced
configuration . . . . . . . . . . . . . . 37
Using the Setup Utility program . . . . . . . . 37
Starting the Setup Utility program . . . . . . 37
Changing the display mode of the Setup Utility
program . . . . . . . . . . . . . . . . 37
Changing the display language of the Setup
Utility program . . . . . . . . . . . . . 37
Enabling or disabling a device . . . . . . . 38
Enabling or disabling the automatic power-on
of your computer . . . . . . . . . . . . 38
Enabling or disabling the ErP LPS compliance
mode . . . . . . . . . . . . . . . . . 38
Enabling or disabling the configuration change
detection . . . . . . . . . . . . . . . 39
Changing the BIOS settings before installing a
new operating system . . . . . . . . . . 39
Using BIOS passwords . . . . . . . . . . 39
Selecting a startup device . . . . . . . . . 41
Changing the fan speed level . . . . . . . . 42
Exiting the Setup Utility program . . . . . . 42
Updating and recovering the BIOS . . . . . . . 42
© Copyright Lenovo 2018 i

Configuring AID . . . . . . . . . . . . . . 43
An Introduction to AID . . . . . . . . . . 43
Configuring AID with Intel STe . . . . . . 44
Configuring AID with AVAGO Mega AID
Configuration Utility . . . . . . . . . . . 45
Configuring AID with Intel Virtual AID on
CPU . . . . . . . . . . . . . . . . . 47
Chapter 6. Troubleshooting,
diagnostics, and recovery . . . . . . . 51
Basic procedure for resolving computer
problems . . . . . . . . . . . . . . . . . 51
Troubleshooting . . . . . . . . . . . . . . 51
Startup problems . . . . . . . . . . . . 51
Audio problems . . . . . . . . . . . . . 52
CD or DVD problems . . . . . . . . . . . 53
Intermittent problems. . . . . . . . . . . 54
Storage drive problems . . . . . . . . . . 54
Ethernet LAN problems . . . . . . . . . . 54
Wireless LAN problem . . . . . . . . . . 55
Bluetooth problems . . . . . . . . . . . 56
Performance problems . . . . . . . . . . 57
Serial connector problem . . . . . . . . . 58
USB device problems . . . . . . . . . . 58
Software and driver problems . . . . . . . 59
Diagnosing problems . . . . . . . . . . . . 59
ecovery information . . . . . . . . . . . . 61
Chapter 7. Hardware removal and
installation . . . . . . . . . . . . . . . 63
Handling static-sensitive devices . . . . . . . . 63
Preparing your computer and removing the
computer cover . . . . . . . . . . . . . . . 63
emoving and installing hardware . . . . . . . 65
External options . . . . . . . . . . . . . 65
Device in the flex bay . . . . . . . . . . . 66
Storage drive in the front-access storage
enclosure . . . . . . . . . . . . . . . 68
Device in the multi-drive conversion kit . . . . 75
Cover presence switch . . . . . . . . . . 86
Storage drive in a storage drive bay . . . . . 88
Storage drive cage . . . . . . . . . . . . 96
M.2 solid-state drive . . . . . . . . . . . 99
Power supply assembly . . . . . . . . . . 107
PCIe card . . . . . . . . . . . . . . . 109
Full-length PCIe card . . . . . . . . . . . 115
Heat-sink-and-fan assembly . . . . . . . . 118
Super capacitor module. . . . . . . . . . 119
Front fan assembly. . . . . . . . . . . . 121
ear fan assembly . . . . . . . . . . . . 123
Memory module . . . . . . . . . . . . . 124
Coin-cell battery. . . . . . . . . . . . . 126
Wi-Fi units . . . . . . . . . . . . . . . 128
Completing the parts replacement . . . . . . . 134
Chapter 8. Getting information, help,
and service . . . . . . . . . . . . . . . 137
Information resources . . . . . . . . . . . . 137
Accessing the user guide in various
languages . . . . . . . . . . . . . . . 137
Windows help system . . . . . . . . . . 137
Safety and warranty . . . . . . . . . . . 137
Lenovo Web site. . . . . . . . . . . . . 137
Lenovo Support Web site . . . . . . . . . 138
Frequently asked questions . . . . . . . . 138
Help and service . . . . . . . . . . . . . . 138
Calling for service . . . . . . . . . . . . 138
Using other services . . . . . . . . . . . 139
Purchasing additional services . . . . . . . 139
Appendix A. System memory
speed. . . . . . . . . . . . . . . . . . 141
Appendix B. Supplemental
information about the Ubuntu operating
system . . . . . . . . . . . . . . . . . 143
Appendix C. Regulatory
information . . . . . . . . . . . . . . . 145
Export classification notice . . . . . . . . . . 145
Electronic emissions notices . . . . . . . . . . 145
Federal Communications Commission
Declaration of Conformity . . . . . . . . . 145
Eurasian compliance mark . . . . . . . . . . 147
Brazil audio notice . . . . . . . . . . . . . . 147
Mexico wireless-radio compliance information. . . 147
Additional regulatory information . . . . . . . . 148
Appendix D. WEEE and recycling
information . . . . . . . . . . . . . . . 149
Important WEEE information. . . . . . . . . . 149
ecycling information for Japan . . . . . . . . 149
ecycling information for Brazil. . . . . . . . . 150
Battery recycling information for Taiwan . . . . . 150
Battery recycling information for the European
Union . . . . . . . . . . . . . . . . . . . 151
Appendix E. Restriction of
Hazardous Substances (RoHS)
Directive . . . . . . . . . . . . . . . . 153
Appendix F. ENERGY STAR model
information . . . . . . . . . . . . . . . 155
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Appendix G. Notices. . . . . . . . . . 157 Appendix H. Trademarks . . . . . . . 159
© Copyright Lenovo 2018 iii

iv P520 User Guide

Read this first: Important safety information
This chapter contains the safety information that you must be familiar with.
Before using this manual
CAUTION:
Before using this manual, be sure to read and understand all the related safety information for this
product. Refer to the information in this section and the safety information in the Safety, Warranty, and
Setup Guide that you received with this product. Reading and understanding this safety information
reduces the risk of personal injury and damage to your product.
If you no longer have a copy of the Safety, Warranty, and Setup Guide, you can obtain a Portable Document
Format (PDF) version from the Lenovo® Support Web site at http://www.lenovo.com/support. The Lenovo
Support Web site also provides the Safety, Warranty, and Setup Guide and this User Guide in additional
languages.
Service and upgrades
Do not attempt to service a product yourself unless instructed to do so by the Customer Support Center or
your documentation. Only use a Service Provider who is approved to repair your particular product.
Note: Some computer parts can be upgraded or replaced by the customer. Upgrades typically are referred
to as options. eplacement parts approved for customer installation are referred to as Customer
eplaceable Units, or C Us. Lenovo provides documentation with instructions when it is appropriate for
customers to install options or replace C Us. You must closely follow all instructions when installing or
replacing parts. The Off state of a power indicator does not necessarily mean that voltage levels inside a
product are zero. Before you remove the covers from a product equipped with a power cord, always ensure
that the power is turned off and that the product is unplugged from any power source. For more information
about C Us, refer to Chapter 7 “Hardware removal and installation” on page 63. 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.
CAUTION:
Keep fingers and other parts of your body away from hazardous, moving parts. If you suffer an injury,
seek medical care immediately.
CAUTION:
Avoid contact with hot components inside the computer. During operation, some components
become hot enough to burn the skin. Before you open the computer cover, turn off the computer,
disconnect power, and wait approximately 10 minutes for the components to cool.
CAUTION:
After replacing a CRU, reinstall all protective covers, including the computer cover, before connecting
power and operating the computer. This action is important to help prevent unexpected electrical
shock and help ensure the containment of an unexpected fire that could happen under extremely rare
conditions.
© Copyright Lenovo 2018 v

CAUTION:
When replacing CRUs, be cautious of sharp edges or corners that might cause injury. If you suffer an
injury, seek medical care immediately.
Static electricity prevention
Static electricity, although harmless to you, can seriously damage computer components and options.
Improper handling of static-sensitive parts can damage the part. When you unpack an option or C U, do not
open the static-protective package containing the part until the instructions direct you to install it.
When you handle options or C Us, or perform any work inside the computer, take the following precautions
to avoid static-electricity damage:
• Limit your movement. Movement can cause static electricity to build up around you.
• Always handle components carefully. Handle adapters, memory modules, and other circuit boards by the
edges. Never touch exposed circuitry.
• Prevent others from touching components.
• When you install a static-sensitive option or C U, touch the static-protective package containing the part
to a metal 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.
• When 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 a smooth, level
surface and place the part on it.
• Do 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. Do not use the ac
power cord for other devices.
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 a power cord around a power 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 a safety 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 a short
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 a power adapter, which can
eventually result in overheating.
Ensure that all power cord connectors are securely and completely plugged into receptacles.
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.
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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 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 a receptacle (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 a qualified electrician.
Do not bend or modify the plug. If the plug is damaged, contact the manufacturer to obtain a replacement.
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 connected devices.
Some products are equipped with a three-pronged plug. This plug fits only into a grounded electrical outlet.
This is a safety feature. Do not defeat this safety feature by trying to insert it into a non-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 a way 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 Universal Serial Bus (USB) cables while
the computer power is on; otherwise, you might damage your computer. To avoid possible damage to
connected devices, wait at least five seconds after the computer is shut down to disconnect external
devices.
Heat and product ventilation
Computers, power adapters, and many accessories can generate heat when turned on and when batteries
are charging. Always follow these basic precautions:
• Do not leave your computer, 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, power adapter, and many accessories produce some heat during normal operation. Extended
contact with the body could cause discomfort or, potentially, a skin burn.
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• Do not charge the battery or operate your computer, power adapter, or accessories near flammable
materials or in explosive environments.
• Ventilation 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 a bed, 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 within two feet of high-traffic areas. If you must operate your computer in or near a high-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:
• Keep the cover closed whenever the computer is plugged in.
• egularly inspect the outside of the computer for dust accumulation.
• emove dust from vents and any perforations in the bezel. More frequent cleanings might be required for
computers in dusty or high-traffic areas.
• Do not restrict or block any ventilation openings.
• Do not store or operate your computer inside furniture, as this might increase the risk of overheating.
• Airflow temperatures into the computer should not exceed 35°C (95°F).
• Do not install air filtration devices. They may interfere with proper cooling.
Computer placement notices
Inappropriate computer placement might cause harm to children.
• Place the computer on a sturdy piece of low-rise furniture or furniture that has been anchored.
• Do not place the computer at the edge of the furniture.
• Keep the computer cables out of the reach of children.
• Some items, such as toys, might attract children. Keep such items away from the computer.
Supervise children in rooms where the above safety instructions cannot be fully implemented.
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 a well-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 storage drive.
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Do not place any beverages on top of or beside the computer or other connected devices. If liquid is spilled
on or in the computer or a connected device, a short circuit or other damage might occur.
Do not eat or smoke over your keyboard. Particles that fall into your keyboard can cause damage.
aser compliance statement
CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber optic devices, or transmitters) are
installed, note the following:
• Do not remove the covers. Removing the covers of the laser product could result in exposure to
hazardous laser radiation. There are no serviceable parts inside the device.
• Use of controls or adjustments or performance of procedures other than those specified herein
might result in hazardous radiation exposure.
DANGER
Some laser products contain an embedded Class 3A or Class 3B laser diode. Note the following:
aser radiation when open. Do not stare into the beam, do not view directly with optical
instruments, and avoid direct exposure to the beam.
Hazardous energy statement
DANGER
Disconnect all power cords from electrical outlets before removing the computer cover or any part
that has the above label attached.
DO NOT disassemble components that have the above label attached. There are no serviceable parts inside
these components.
Your product is designed for safe use. However, hazardous voltage, current, and energy levels are present
inside any component that has this label attached. Disassembling of these components might cause fire or
might even result in death. If you suspect a problem with one of these parts, contact a service technician.
ithium coin-cell battery notice
DANGER
Danger of explosion if battery is incorrectly replaced.
© Copyright Lenovo 2018 ix

When replacing the lithium coin-cell battery, use only the same type or equivalent type that is recommended
by the manufacturer. The battery contains lithium and can explode if not properly used, handled, or disposed
of. Swallowing the lithium coin-cell battery will cause chocking or severe internal burns in just two hours and
might even result in death.
Keep batteries away from children. If the lithium coin-cell battery is swallowed or placed inside any part of
the body, seek medical care immediately.
Do not:
• Throw or immerse into water
• Heat to more than 100 °C (212°F).
• epair or disassemble
• Leave in an extremely low air pressure environment
• Leave in an extremely high-temperature environment
• Crush, puncture, cut, or incinerate
Dispose of the battery as required by local ordinances or regulations.
The following statement applies to users in the state of California, U.S.A.
California Perchlorate Information:
Products containing manganese dioxide lithium coin-cell batteries may contain perchlorate.
Perchlorate Material - special handling may apply, see http://www.dtsc.ca.gov/hazardouswaste/
perchlorate/.
Using earphones, headphones, or a headset
• If your computer has both a headphone connector and an audio line-out connector, always use the
headphone connector for earphones, headphones, or a headset. However, the headphone connector
does not support the microphone of the headset.
• If your computer has both a headset connector and an audio line-out connector, always use the headset
connector for earphones, headphones, or a headset.
CAUTION:
Excessive sound pressure from earphones and headphones can cause hearing loss. Adjustment of
the equalizer to maximum increases the earphone and headphone output voltage and the sound
pressure level. Therefore, to protect your hearing, adjust the equalizer to an appropriate level.
Excessive use of headphones or earphones for a long period of time at high volume can be dangerous if the
output of the headphone or earphone connectors do not comply with specifications of EN 50332-2. The
headphone output connector of your computer complies with EN 50332-2 Sub clause 7. This specification
limits the computer’s maximum wide band true MS output voltage to 150 mV. To help protect against
hearing loss, ensure that the headphones or earphones you use also comply with EN 50332-2 (Clause 7
Limits) or a wide band characteristic voltage of 75 mV. Using headphones that do not comply with EN 50332-
2 can be dangerous due to excessive sound pressure levels.
If your Lenovo computer came with headphones or earphones in the package, as a set, the combination of
the headphones or earphones and the computer already complies with the specifications of EN 50332-1. If
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different headphones or earphones are used, ensure that they comply with EN 50332-1 (Clause 6.5
Limitation Values). Using headphones that do not comply with EN 50332-1 can be dangerous due to
excessive sound pressure levels.
Cleaning and maintenance
Keep your computer and workspace clean. Shut down the computer and then disconnect the power cord
before cleaning the computer. Do not spray any liquid detergent directly on the computer or use any
detergent containing flammable material to clean the computer. Spray the detergent on a soft cloth and then
wipe the computer surfaces.
© Copyright Lenovo 2018 xi

xii P520 User Guide

Chapter 1. Product overview
This chapter provides basic information to help you get familiar with your computer.
Hardware locations
This section provides information about the locations of your computer hardware.
Front view
Note: The computer hardware might look slightly different from the illustration.
Figure 1. Front connectors, controls, and indicators
1 Optical-drive eject/close button (available on some
models)
2 Signal diagnostic LED indicator
3 Power button 4 Power indicator
5 Storage drive activity indicator 6 Photoelectric sensor
7 Headset connector 8 USB 3.0 connectors (4)
9 SD card slot
1 Optical-drive eject/close button (available on some models)
Press the button to eject or close the tray of the optical drive.
© Copyright Lenovo 2018 1

2 Signal diagnostic ED indicator
Off (when the computer is powered on): No error or issue is detected on your computer during normal
operation.
On: A catastrophic error is detected on your computer during normal operation.
Blinking: An error or issue is detected on your computer during normal operation.
3 Power button
Press the power button to turn on your computer. If your computer is unresponsive, you can turn off the
computer by pressing and holding the power button for four or more seconds.
4 Power indicator
When the power indicator is on, the computer is turned on.
5 Storage drive activity indicator
This indicator shows the status of the internal storage drives (such as hard disk drives or solid-state drives).
On: The storage drives are active and data is being transferred.
Off (when the computer is powered on): No data is being transferred or the storage drives are not in use.
6 Photoelectric sensor
This sensor receives the flash light sent by the Lenovo PC Diagnostics application installed in the
smartphone. Then, the photoelectric sensor triggers the computer to send the tune of the detected error to
the smartphone for users to decode the error.
7 Headset connector
Use this connector to attach a headset to your computer.
8 USB 3.0 connector (4)
Use this connector to attach a USB-compatible device, such as a USB keyboard, mouse, storage drive, or
printer.
9 SD card slot
Insert a secure digital (SD) card into the slot to access the data on the card.
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Rear view
Some connectors on the rear of your computer are color-coded to help you determine where to connect the
cables on your computer.
Note: The computer hardware might look slightly different from the illustration.
Figure 2. Rear view
1 PS/2 mouse connector 2 PS/2 keyboard connector
3 Optional serial connector 4 Ethernet connector
5 USB 3.0 connectors (4) 6 USB 2.0 connectors (2)
7 Microphone connector 8 Audio line-out connector
9 Audio line-in connector 10 Power-cord connector
11 Security-lock slot 12 Key-nest slots
13 PCI/PCIe card area*
Chapter 1.Product overview 3

Notes: *A discrete graphics card or a network adapter can be installed in the appropriate Peripheral
Component Interconnect (PCI)/PCI Express (PCIe) card slot. If such a card is installed, use the connectors on
the card instead of the corresponding connectors on the computer to optimize the performance. Depending
on your computer model, the preinstalled cards might vary. One or more graphics cards might be installed to
provide the following connectors:
• Digital Visual Interface (DVI) connector
• DisplayPort® connector
• Mini DisplayPort® connector
DisplayPort connector
Use this connector to attach a high-performance monitor, a direct-drive monitor, or other compatible
devices.
DVI monitor connector
Use this connector to attach a DVI monitor or other compatible devices.
Mini DisplayPort connector
Use this connector to attach a high-performance monitor, a direct-drive monitor, or other compatible
devices. The Mini DisplayPort connector is a miniaturized version of a DisplayPort connector.
1 PS/2 mouse connector
Use this connector to attach a Personal System/2 (PS/2) mouse, a trackball, or other pointing devices.
2 PS/2 keyboard connector
Use this connector to attach a PS/2 keyboard.
3 Optional serial connector
Use this connector to attach an external modem, a serial printer, or other devices that use a 9-pin serial
connector.
4 Ethernet connector
Connect an Ethernet cable for a local area network (LAN).
Note: To operate the computer within Federal Communications Commission (FCC) Class B limits, use a
Category 5 Ethernet cable.
5 USB 3.0 connectors (4)
Use this connector to attach a USB-compatible device, such as a USB keyboard, mouse, storage drive, or
printer.
6 USB 2.0 connectors (2)
Use this connector to attach a USB-compatible device, such as a USB keyboard, mouse, storage drive, or
printer.
4P520 User Guide

7 Microphone connector
Use this connector to attach a microphone to your computer when you want to record sound or if you use
speech-recognition software.
8 Audio line-out connector
The audio line-out connector is used to send audio signals from the computer to external devices, such as
headphones.
9 Audio line-in connector
The audio line-in connector is used to receive audio signals from an external audio device, such as a stereo
system. When you attach an external audio device, a cable connection is established between the audio line-
out connector of the device and the audio line-in connector of the computer.
10 Power-cord connector
Connect the power cord to your computer for power supply.
11 Security-lock slot
Attach a Kensington-style cable lock to the security-lock slot to secure your computer. For more information,
see “Attaching a Kensington-style cable lock” on page 32.
12 Key-nest slots
Install the key holder that comes with the computer-cover-lock key to the key-nest slots.
13 PCI/PCIe card area
To further improve the computer performance, you can install PCI/PCIe cards into this area. Depending on
your computer model, the pre-installed cards in this area might vary.
Chapter 1.Product overview 5

Computer components
Notes:
• Depending on the model, your computer might look slightly different from the illustration.
• To remove the computer cover, see “Preparing your computer and removing the computer cover” on
page 63.
Figure 3. Co ponent locations
1 Heat-sink-and-fan assembly 2 Memory modules*
3 Flex bays* 4 Storage drive cage*
5 Front fan assembly 6 Storage drives*
7 M.2 solid-state drives* 8 Power supply assembly
9 PCI/PCIe card* 10 ear fan assembly
11 Cover presence switch (also called intrusion switch)
* Configuration varies by computer models.
6P520 User Guide