HP Pavilion 21-a000 Specification sheet

12” (30cm)
12” (30cm)

http://www.hp.com/go/contactHP http://welcome.hp.com/country/us/en/wwcontact_us.html

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Company, L.P. The information contained herein
is subject to change without notice.
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constituting an additional warranty. HP shall not
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Warranty Print on Demand Statement
You can find the expressly provided HP Limited
Warranty applicable to your product in the start
menu on your PC and/or in the CD/DVD
provided in the box. For some countries/regions,
a printed HP Limited Warranty is provided in the
box. In countries/regions where the warranty is
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Please include your product name, warranty
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1 Getting information
Type of information Where to find
●Set up your computer. Quick Setup (this Guide)
●Use the computer.
●Connect to the Internet.
Quick Setup (this Guide)
●Recover factory settings. Troubleshooting and Maintenance Guide on your computer. At the bottom
of your screen, click on Start, then click HP Help and Support and HP
User Manuals.
●See how-to videos about using
the features of your computer.
Visit http://www.hp.com/supportvideos (English only)
●Learn how to use the Microsoft
Windows 7 operating system.
●Find Windows 7 password
information.
●Find links to driver updates.
●Read frequently asked
questions.
Help and Support
Click Start, and then click Help and Support or visit
http://www.hp.com/go/win7.
Windows 7 troubleshooting tools
1. Click Start, click Control Panel, and then click System and
Security.
2. Under Action Center, click Find and fix problems
(troubleshooting).
●Troubleshoot the most common
computer hardware and
software issues.
Troubleshooting and Maintenance Guide on your computer. At the bottom
of your screen, click on Start, then click HP Help and Support and HP
User Manuals.
●Find electronic user guides
and specifications for your
computer model.
●Order parts and find
additional troubleshooting
help.
HP Support website: http://www.hp.com/go/contactHP
●Upgrade or replace
components of your computer.
Upgrading and Servicing Guide
HP Support website: http://www.hp.com/go/contactHP
1

Type of information Where to find
●Find computer warranty
information.
●Get technical support.
Limited Warranty and Support Guide or the Warranty and Support
Information included with your computer.
Or
Click Start, click All Programs, and then click HP User Manuals.
●Get up-to-date information and
help from the Windows
community.
http://www.hp.com/support/consumer-forum
●Connect to a TV. Watching and Recording TV
Click Start, click All Programs, and then click HP User Manuals.
If the guide is not available there, visit http://www.hp.com/go/contactHP
●Get special utilities for
computer owners.
PC Help & Tools folder
Click Start, click All Programs, and then click PC Help & Tools.
●Maintain your computer. HP Support Assistant — Maintains your computer performance and resolve
problems faster by using automated updates, on-board diagnostics, and
guided assistance.
Click Start, click All Programs, click HP, and then click HP Support
Assistant.
Troubleshooting and Maintenance Guide
Click Start, click HP Help and Support, and then click HP User
Manuals.
Maintaining Your Computer (this Guide)
●Find safety and regulatory
notices.
Safety & Regulatory Information
Click Start, click HP Help and Support, and then click HP User
Manuals or visit http://www.hp.com/go/contactHP.
●Find ergonomic information. Safety & Comfort Guide
Click Start, click HP Help and Support, and then click HP User
Manuals or visit http://www.hp.com/ergo.
2 Chapter 1 Getting information

2 Setting up your computer
WARNING! To reduce the risk of electrical shock or damage to your
equipment:
• Place the computer in a location away from water, dust, moisture, and soot.
These can increase the inside temperature, or can cause fire or electrocution.
• 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.
• Disconnect power from the equipment by unplugging the power cord from the
electrical outlet. To prevent direct exposure to laser beam, do not try to open the
enclosure of the CD or DVD drives.
• The power supply is preset for the country/region in which you purchased your
computer. If you move, check the voltage requirements for your new location
before plugging the computer into an AC power outlet.
The computer may be heavy; be sure to use ergonomically correct lifting
procedures when moving the computer.
To reduce the risk of serious injury read the Safety & Comfort Guide. The guide is
located on the web at http://www.hp.com/ergo.
1. Place the computer so that all ventilation openings are unobstructed and
cabling is not in a walkway or where it can be stepped on or damaged by
placing furniture on it.
2. Connect all power cords from the monitor, computer, and accessories to a
power surge protection device that is specifically labeled as having surge
protection, an uninterruptible power supply (UPS), or a similar device. If the
computer has a television tuner, or a modem or telephone connection, protect
the computer by using surge protection with these signal inputs as well.
Connect the television cable or the telephone line cord to the surge protection
device, and then connect the device to the computer.
3. Download and install operating system updates.
a. Find out what operating system and version your computer is currently
running.
(Click Start > Control Panel and double-click System. The operating
system and version are shown under Windows edition.)
b. Open your internet browser and go to http://www.hp.com/go/
contactHP.
c. Select your country and language, if necessary, and click Support &
Drivers.
3

d. Select Download drivers and software (and firmware), type
your computer model name and number in the product field, and press
Enter.
e. If necessary, select your computer model from Product search
results.
f. Select your computer operating system.
g. Click Download next to each update you wish to download.
h. Follow the on-screen instructions to install each downloaded update.
4. Look in the computer box for additional printed details or updates.
5. Read the Safety and Regulatory Information document in the HP User Manuals
folder.
6. Read the Safety & Comfort Guide for proper workstation setup, posture,
health and work habits, and electrical and mechanical safety information.
Click Start, click All Programs, and then click HP User Manuals or visit
http://www.hp.com/ergo.
After you complete the initial computer setup, you might want to install additional
software programs or hardware devices. Check the operating system, memory,
and other requirements listed before purchasing new software or hardware for
your computer. Follow the software manufacturer's directions to install the new
software.
NOTE: Use only licensed original software. Installing copied software could
result in an unstable installation, infect the computer with a virus, or be illegal.
Security solutions can deter theft, mishandling, and software attacks, but cannot
prevent them.
Connecting to the Internet
Steps to connect to the Internet:
1. Connect the hardware as shown on the setup view.
2. Get Internet service.
●Sign up with an Internet Service Provider (ISP). If you already have an
account with an ISP, skip this step and follow the instructions provided
by the ISP.
●If you did not set up the computer for Internet service during the initial
setup, do so now by using Online Services:
a. Click Start, click All Programs, click Online Services, and
then click Get Online.
b. Follow the on-screen instructions to select an ISP and set up Internet
service.
4 Chapter 2 Setting up your computer

NOTE: Online Services provides a list of ISPs; however, you
might choose another ISP or transfer an existing account to this
computer. To transfer existing accounts, follow the instructions
provided by the ISP.
3. Using your Internet connection through your ISP, open a web browser and
browse the Internet.
NOTE: If you have issues connecting to the Internet, see Internet access
on page 14.
Connecting to the Internet 5

3 Setting up additional features
Using Beats Audio™ (select models only)
Your HP TouchSmart PC features audio connectors (headphone and Audio Out )
that are optimized for Beats Audio™ headphones and external audio systems
(purchased separately). Select HP TouchSmart PC models also include four Beats-
optimized internal speakers and a Beats toggle button on the keyboard.
Your computer comes ready for you to experience music with Beats enabled. To
disable Beats, press the Beats toggle button; the Beats-off icon appears on the
screen. To turn Beats on, press the Beats toggle button again. If your keyboard
does not contain the Beats toggle button, press Fn+B to enable and disable Beats.
Tap the Beats icon on the system tray to view the Beats user interface.
All you need to do is plug the Beats Audio headphones into the side headphone
connector to experience crisp and clear sound separation. To experience the full
capability of BEATS audio using the internal speakers, HP recommends connecting
a matching HP subwoofer to the Sub connector on the back panel. If you are using
an external audio system, plug it into the Audio Out connector on the back panel.
Using the HDMI port controls (select models only)
The right side of your computer may contain an HDMI port and volume control
buttons. Unless a device is plugged into the HDMI port, the volume controls have
no functionality. The HDMI controls are only intended to control the settings of the
device plugged into that port, and do not control any other media devices on the
system.
To use the HDMI port controls, plug a device into the HDMI port. Press the menu
button (the top button displayed). A new on-screen menu displays. Using the +/-
buttons, select brightness, volume, contrast, or color balance.
When a device is plugged into the HDMI port, the volume on the computer is
muted. Pressing the +/- buttons on the side panel does not change the volume of
the computer.
6 Chapter 3 Setting up additional features

4 Maintaining your computer
Cleaning procedures
Keeping your computer system free of dust, dirt, and heat will prolong its life.
●Dust, pet hair, and other particles can build up, creating a blanket effect; as a result, components can
overheat or, in the case of the keyboard and mouse, not work smoothly and effectively.
●Check your system once a month for visible signs of dust and debris, and clean it about once every three
months.
●Visit www.hp.com/go/contactHP for additional cleaning instructions.
Cleaning the computer
vents
Air vents keep the computer cool. Keep these vents clean by using a small, battery-
powered vacuum cleaner. (A battery-powered vacuum cleaner eliminates the risk of
electric shock.)
1. Vacuum the vents on the computer case.
2. Remove any debris that has accumulated in and around the computer
connectors (for example, the Ethernet and USB connectors).
Cleaning procedures 7

Cleaning the keyboard and
mouse
When cleaning the keyboard keys, use a low setting on a battery-powered vacuum
cleaner, to avoid removing key caps and springs.
1. Vacuum between the keys of the keyboard and along the grooves.
2. Use a clean, dry cloth and isopropyl (rubbing) alcohol to clean buildup on the
keyboard keys and along its edges.
3. Wipe the body of the mouse and the mouse cord by using cleaning wipes.
If you have a roller-ball mouse, clean the ball and rollers inside:
1. Turn the mouse upside down, and rotate the ball-cover ring counterclockwise
to remove the ring and release the roller ball.
2. Rinse the roller ball with soap and warm water.
3. Clean the rollers inside the mouse with a cotton swab dampened with
isopropyl (rubbing) alcohol.
4. After the roller ball and rollers are completely dry, replace the ball and ball-
cover ring.
Cleaning the touch screen
(AiO models only)
Follow these steps to clean the touch screen:
1. Turn off the computer. Tap the Start button, and then tap Shut Down.
2. Disconnect the power cord from the wall.
3. Spray a small amount of mild glass cleaner on a soft cloth to clean the touch
screen.
4. Wipe the surface and left and right side of the touch screen to remove any
dirt, fingerprints, or other debris that could hinder the touch recognition of the
screen.
CAUTION: Do not spray or place the cleaner directly on the screen; spray the
cleaner into the cloth, and then wipe the sides and surface of the touch screen.
Do not use an abrasive cleaner or cloth when cleaning the sides or the surface of
the screen, because this could cause damage to the touch screen.
8 Chapter 4 Maintaining your computer

5 Troubleshooting
Refer to the documentation provided by the product manufacturer for information
about peripheral-specific problems, such as issues with a monitor or a printer. The
following tables present some issues you might encounter while installing, starting
up, or using your computer and possible solutions.
For more information or for additional troubleshooting options, see Getting
information on page 1.
Computer does not start
Symptom Possible solution
Error message:
Hard disk drive
error.
Restart the computer.
1. Press the Ctrl+Alt+Delete keys on the keyboard simultaneously.
2. Click the Arrow button next to the red Shut Down button, and then click Restart.
Or, press and hold the Power button on the computer for 5 or more seconds to turn off
the computer, and then press the Power button to restart the computer.
3. If Windows opens, immediately back up all important data to a backup hard disk drive.
4. Contact Support, whether it was possible or not to start up Windows.
Either the hard disk drive or the system board may need to be replaced.
Computer will
not turn on or
start.
Ensure that the cables connecting the computer to the external power source are plugged in
properly. When the cables connecting the computer to the external power source are plugged
in properly, and the wall outlet is functioning, the green power supply light on the back of the
computer should be on; if it is not, contact Support.
Test the wall outlet by connecting a different electrical device to it.
Computer does not start 9

Symptom Possible solution
Computer seems
to be locked up
and is not
responding.
Use the Windows Task Manager to close any programs not responding, or restart the
computer:
1. Press the Ctrl+Alt+Delete keys on the keyboard simultaneously.
2. Click Start Task Manager.
3. Select the program that is not responding, and then click End Task.
If closing programs does not work, restart the computer:
1. Press the Ctrl+Alt+Delete keys on the keyboard simultaneously.
2. Click the Arrow button next to the red Shut Down button, and then click Restart.
Or, press and hold the Power button on the computer for 5 or more seconds to turn off
the computer, and then press the Power button to restart the computer.
Error message:
Invalid system
disk or Non-
System disk or
Disk error.
When drive activity stops, remove the disc and press the spacebar on the keyboard. The
computer should start up.
10 Chapter 5 Troubleshooting

Power
Symptom Possible solution
Computer does
not turn off when
the Power button
is pressed.
Press and hold the Power button until the computer turns off. Check Power Settings.
Computer shuts
down
automatically.
●The computer might be in an exceedingly hot environment. Let it cool down.
●Ensure that computer air vents are not blocked and that the internal fan is running — see :
Cleaning procedures on page 7. (Your computer might not have an internal fan.)
Display (monitor)
Symptom Possible solution
Screen is blank. Press the space bar on the keyboard or move the mouse to make the screen display visible
again.
Press the Sleep button (select models only), or Esc on the keyboard, to resume from Sleep
mode.
Press the Power button to turn on the computer.
Power 11

Keyboard and mouse (general)
Symptom Possible solution
Keyboard
commands and
typing are not
recognized by the
computer.
Use the mouse to turn off the computer, unplug and reconnect the keyboard to the back of
your computer, and then restart your computer.
Mouse (with cable)
does not work or is
not detected.
Unplug and reconnect the mouse cable to your computer.
If the mouse is still not detected, turn off the computer, unplug and reconnect the mouse
cable, and then restart the computer.
Cursor does not
move using the
arrow keys on the
number keypad.
Press Num Lock on the keyboard to turn off Num Lock, so that the arrow keys on the
number keypad can be used.
Cursor does not
respond to mouse
movement.
Use the keyboard to save changes in all open programs, and then restart your computer:
1. Press the Alt+Tab keys simultaneously to navigate to an open program.
2. Press Ctrl+S simultaneously to save your changes in the selected program (Ctrl+S is
the keyboard shortcut for Save on most—not all—programs).
3. Repeat step 1 and step 2 to save changes in all open programs.
4. After saving changes in all open programs, press the Ctrl+Esc keys on the keyboard
simultaneously to display the Windows Start menu.
5. Use the arrow keys to select the Arrow button that is next to Shut Down. Select Shut
Down, and then press Enter.
6. After the shutdown is complete, unplug and reconnect the mouse connector to the
back of your computer, and then restart your computer.
12 Chapter 5 Troubleshooting

Keyboard and mouse (wireless)
Symptom Possible solution
Wireless keyboard
or mouse does not
work or is not
detected.
●Ensure that you are using the wireless keyboard or wireless mouse within range of the
receiver, approximately 3meters (10 feet) for normal use, and within 30 cm (12
inches) during initial setup or for re-synchronization.
●Ensure that the mouse is not in Suspend mode, which occurs after 20 minutes of
inactivity. Click the left mouse button to reactivate it.
●Replace the batteries in the keyboard and mouse.
●Re-synchronize the keyboard and mouse to the receiver using the following steps.
The receiver, wireless keyboard, and wireless mouse shown in the following illustrations
are examples; your models might vary. IMPORTANT: During these steps, place the
wireless keyboard and wireless mouse on the same level as the receiver, within 30 cm (12
inches) of the receiver, and away from interference from other devices.
1. Unplug the receiver from a USB connector on the computer, and then reconnect it.
Your computer model might have a connector dedicated to the receiver. If you have a
choice, use a USB connector on the front of the computer.
2. Check that the mouse is on (A), and push and hold the Connect button (B) on the
underside of the mouse for 5 to 10 seconds until the LED on the receiver lights or
stops flashing. The receiver connection session times out after 60 seconds. To ensure
that the connection was established, and that the receiver did not time out instead,
move the mouse and check for response on the screen.
Off
On
Connect
A
B
3. After the mouse connection is established, continue by using the steps that follow to
repeat the procedure for the keyboard.
4. Push and hold the Connect button (C) on the underside of the keyboard for 5 to 10
seconds until the LED on the receiver lights or stops flashing.
C
Keyboard and mouse (wireless) 13

Speakers and sound
Symptom Possible solution
No sound is
produced.
For Windows 7:
1. Click Start, click Control Panel, click Action Center, and then click
Troubleshooting.
2. Under Hardware and Sound, click Troubleshoot and audio playback.
If you are using built-in monitor speakers, use the monitor front-panel Volume button to
adjust volume. Use the front-panel buttons to enter the on-screen display (OSD) and ensure
that audio is enabled and that the volume is set appropriately.
Ensure that you connected powered (active) speakers and that they are turned on.
Turn off your computer, and then unplug and reconnect the speakers. Ensure that the
speakers are connected to an audio connector, not a Line In or headphone connector.
To resume from Sleep mode, press the Sleep button (select models only), or press Esc.
Unplug headphones if they are connected to your computer (or speaker system).
Volume is very low
or unsatisfactory.
Ensure that you connected the speakers to the Audio Out (lime green) connector on the
back of the computer. (Additional audio connectors are used for multiple-channel
speakers.) Detached non-powered speakers (speakers without a separate power source,
such as batteries or a power cord) do not produce satisfactory sound. Replace the non-
powered speakers with powered speakers.
Internet access
Symptom Possible solution
Internet programs do
not start
automatically.
Log in to your ISP, and start the desired program.
14 Chapter 5 Troubleshooting

Symptom Possible solution
I cannot connect to
the Internet.
For Windows 7:
1. Click Start, click Control Panel, click Action Center, and then click
Troubleshooting.
2. Under Network and Internet, click Connect to the Internet.
Verify that you are using the proper cables for your Internet connection type. Your
computer might have a dial-up modem and an Ethernet network adapter (also called a
network interface card, or NIC). A modem uses a standard telephone cable, whereas the
network adapter uses a network cable, to connect to a local area network (LAN). Do not
connect a telephone cable to the network adapter, and do not plug a network cable into a
telephone service line; doing so might damage the network adapter.
Run the wireless setup wizard:
1. Click Start, click Control Panel, click Network and Internet, and then click
Network and Sharing Center.
2. In the Network and Sharing Center window, click Set up a connection or
network to open the wizard, and then follow the on-screen instructions.
If your system has an external antenna, try to move the antenna to a better position. If the
antenna is internal, try to move the computer.
Try to connect again later, or contact your Internet service provider (ISP) for assistance.
Software troubleshooting
To repair
software
problems, try
these methods:
●Turn the computer off completely and then turn it on again. This is the easiest (and
sometimes the best) way.
●Update the drivers (see Updating device drivers, following).
●Use Microsoft System Restore Software program and hardware driver reinstallation (see
Microsoft System Restore, later in this table). — Restores your computer to a configuration
that was in use before the software was installed.
●Reinstall the software program or hardware driver (see Software program and hardware
driver reinstallation, later in this table). — Restores the software (if it came with the
product) or hardware driver to factory defaults.
●System Recovery (see Troubleshooting and Maintenance Guide on your computer. At the
bottom of your screen, click on Start, then click HP Help and Support and HP User
Manuals. ) — Erase and reformat the hard disk drive, and then reinstall the operating
system, programs, and drivers. This erases all data files you have created.
Software troubleshooting 15

Updating device
drivers
Complete the following procedure to update a driver, or to revert to an earlier version of the
driver if the new one does not solve your problem:
1. Click Start.
2. Type Device Manager into the Start Search box, and then click Device Manager
to open the Device Manager window.
3. Click the plus sign (+) to expand the type of device you want to update or rollback. (For
example, DVD/CD-ROM drives).
4. Double-click the specific item (for example, HP DVD Writer 640b).
5. Click the Driver tab.
6. To update a driver, click Update Driver, and then follow the on-screen instructions.
Or, to revert to an earlier version of a driver, click Rollback Driver, and then follow the
on-screen instructions.
Microsoft System
Restore
If you have a problem that might be due to software that was installed on your computer, use
System Restore to return the computer to a previous restore point. You can also set restore
points manually.
NOTE: Always use this System Restore procedure before you use the System Recovery
program.
To start a System Restore:
1. Close all open programs.
2. Click Start, right-click Computer, and then click Properties.
3. Click System protection, System Restore, click Next, and then follow the on-
screen instructions.
To add restore points manually:
1. Close all open programs.
2. Click Start, right-click Computer, click Properties, and then click System
protection.
3. Under Protection Settings, select the disk for which you want to create a restore point.
4. Click Create, and then follow the on-screen instructions.
16 Chapter 5 Troubleshooting