HP Pavilion Dm3 2100 Entertainment Notebook Pc Series Manual

							Notebook Essentials35
Appendix A: Troubleshooting
If you experience computer problems, perform these troubleshooting steps in the order 
provided until the problem is resolved:
■Refer to “Quick troubleshooting,” the next section in this chapter.
■Access Web site links and additional informa tion about the computer through Help and 
Support. Click  Start, and then click  Help and Support.
✎Although many checkup and repair tools require an Internet connection, o\
ther 
tools, like Help and Support, can help you fix a problem when the comput\
er is 
offline.
The computer is unable to start up
If the computer does not turn on when you slid e the power switch, the following suggestions 
may help you resolve the problem:
■If the computer is plugged into an AC outlet,  unplug the computer and then plug another 
electrical device into the outlet to be sure that the outlet is providing adequate power.
✎Use only the AC adapter provided with the computer or one approved by HP for 
this computer.
■If the computer is running on battery power or  is plugged into an external power source 
other than an AC outlet, plug the computer in to an AC outlet using the AC adapter. Be 
sure that the power cord and AC adapter connections are secure.
The computer screen is blank
If the screen is blank, but the computer is on  and the power light is lit, the computer may not 
be set to display the image on the computer screen. To transfer the image to the computer 
screen, press the switch screen image key.
Software is functioning abnormally
If the software is unresponsive or responds abnormally, follow these suggestions:
■Restart the computer by clicking  Start, clicking the arrow next to the Shutdown button, 
and then clicking  Restart.
If you cannot restart the computer using this  procedure, refer to the next section, “The 
computer is on but is not responding.”
■Run a virus scan. For information about using the antivirus resources on the computer, 
refer to the “Protecting the computer from viruses” section in Cha\
pter 4.
Troubleshooting resources
Quick troubleshooting 
						

							36Notebook Essentials
Appendix A: Troubleshooting
The computer is on but is not responding
If the computer is on but is not responding to software or keyboard commands, try the 
following emergency shutdown procedures, in  the sequence provided, until shutdown occurs:
ÄCAUTION: Emergency shutdown procedures result in the loss of unsaved information.
■Slide and hold the power switch for at least 5 seconds.
■Disconnect the computer from external power and remove the battery.
The computer is unusually warm
It is normal for the computer to feel warm to th e touch while it is in use. But if the computer 
feels  unusually  warm, it may be overheating because a vent is blocked.
If you suspect that the computer is overheat ing, allow the computer to cool to room 
temperature. Then be sure to keep all vents free from obstructions while you are using the 
computer.
ÅWARN I NG:  To reduce the possibility of heat-related injuries or of overheating the computer, 
do not place the computer directly on your lap or obstruct the computer air vents. Use the 
computer only on a hard, flat surface. Do not allow another hard surface, such as an 
adjoining optional printer, or a soft surface,  such as pillows or rugs or clothing, to block 
airflow. Also, do not allow the AC adapter to  contact the skin or a soft surface, such as 
pillows or rugs or clothing, during operation. The computer and the AC adapter comply 
with the user-accessible surface temperature limi ts defined by the International Standard for 
Safety of Information Technology Equipment (IEC 60950).
✎The fan in the computer starts up automatically to cool internal components and prevent 
overheating. It is normal for the internal fan to always be on during operation.
An external device is not working
Follow these suggestions if an external device does not function as expected:
■Turn on the device according to the manufacturers instructions.
■Be sure that all device connections are secure.
■Be sure that the device is receiving electrical power.
■Be sure that the device, especially if it is  older, is compatible with the operating system.
■Be sure that the correct drivers are installed and updated. 
						

							Notebook Essentials37
Appendix A: Troubleshooting
The wireless network connection is not working
If a wireless network connection is not working as expected, follow these suggestions:
✎If you are connecting to a corporate network, contact the IT administrat\
or.
■Click Start, click  Control Panel , click Network and Internet , click Network and 
Sharing Center , click Troubleshoot problem , and then follow the on-screen 
instructions.
■Be sure that the wireless device is turned on and the wireless light on the computer is 
blue. If the light is amber, turn on the wireless device.
■Be sure that the computer wireless antennas are free from obstructions.
■Be sure that the cable or DSL modem and  its power cord are properly connected and 
that the lights are on.
■Be sure that the wireless router or acce ss point is properly connected to its power 
adapter and the cable or DSL modem, and that the lights are on.
■Disconnect and then reconnect all cables, an d turn the power off and then back on.
✎For more information on wireless technology,  refer to the information and the Web site 
links in Help and Support.
✎For information on activating broadband wireless service, refer to the mobile network 
operator information included with the computer. 
						

							Notebook Essentials39
Appendix B: Specifications
The operating environment information in the following table may be helpful if you plan to 
use or transport the computer in extreme environments.
The power information in this section may be helpful if you plan to travel internationally 
with the computer.
The computer operates on DC power, which can be supplied by an AC or a DC power source. 
Although the computer can be powered from a standalone DC power source, it should be 
powered only with an AC adapter or a DC powe r source supplied and approved by HP for use 
with this computer.
The computer is capable of accepting DC  power within the following specifications.
✎This product is designed for IT power system s in Norway with phase-to-phase voltage 
not exceeding 240 V rms.
✎The computer operating voltage and current can be found on the system regulatory label 
on the bottom of the computer.
Operating environment
Factor MetricU.S.
Temperature
Operating (writing to optical disc) 10°C to 35°C50°F to 95°F
Nonoperating -20°C to 60°C-4°F to 140°F
Relative humidity  (noncondensing)
Operating 10% to 90%10% to 90%
Nonoperating 5% to 95%5% to 95%
Maximum altitude  (unpressurized)
Operating -15 m to 3,048 m-50 ft to 10,000 ft
Nonoperating -15 m to 12,192 m-50 ft to 40,000 ft
Input power
Input power Rating
Operating voltage 19 V dc or 18.5 V dc
Operating current 4.74 A or 6.50 A 
						

							Notebook Essentials41
Index
A
AC adapter 16
altitude specifications 39
antivirus software 15
B
backing up 27
backing up customized window, toolbar, 
and menu bar settings 27
blank screen, troubleshooting 35
C
Chat 12
cleaning the display 33
cleaning the keyboard 33
computer viruses 15
computer, turning off 16
computer, turning on 35
connect to a wired network 21
Connect to the Internet wizard 17, 18
creating a CD or DVD 25
customer support, user guides 4
D
devices, external, troubleshooting 36
display, cleaning 33
documentation 4
E
Easy Internet Services 17
electric shock 16
environmental specifications 39
external devices, troubleshooting 36
F
firewalls 15
full system recovery 27
H
HDMI (High Definition Multimedia 
Interface) 2
HP QuickWeb 1
HP Recovery Manager 27
humidity specifications 39
I
identifying software 23
IEC 60950 compliance 16, 36
input power specifications 39
Internet choosing an ISP 17
choosing type of access 17
wireless access 17
Internet service provider (ISP) 17
K
keyboard, cleaning 33
L
LaunchBar icons, identifying 8
M
MediaSmart, using 24
Microsoft Windows, starting 7
N
Norton Internet Security 15
notification, identifying icons 9
O
operating environment specifications 39
overheating, computer 36
P
performing a recovery 30
power cord 16
power specifications 39
power surges 16
power, turning on computer 35
privacy, protecting 15 
						

							42Notebook Essentials
Index
Q
QuickWeb 5
browsing photos 11
configuring the network 10
identifying 7
playing music 11
setting up 6
Settings Panel 10
turning on and off 13
using 6
R
recovering a program or driver 27
recovering from the dedicated recovery 
partition 31
recovering using the recovery discs 31
recovery discs 28
Recovery Manager 30
recovery partition 27
recovery, system 27, 30
regulatory information notices 4, 33, 39
Regulatory, Safety and  Environmental Notices 4, 33, 39
restore points 29
S
safe computing practices 16
shipping the computer 33
Skype 12
software antivirus 15
identifying 23
safeguarding information 27
troubleshooting 35
updating 26
specifications altitude 39
humidity 39
input power 39
operating environment 39
temperature 39
startup problems, troubleshooting 35
surge protection 16
system failure or instability 27
system recovery 27
system restore points 27, 29
T
temperature safety considerations 16, 36
specifications 39
troubleshooting 36
TouchPad, cleaning 33
traveling with the computer 33, 39
troubleshooting 35 blank screen 35
display problems 35
external device problems 36
overheating problems 36
resources 35
software problems 35
startup problems 35
unresponsive computer 36
virus problems 35
wireless network problems 37
U
unresponsive computer, troubleshooting 36
user guides 4
using MediaSmart 24
using system restore 29
V
vents, precautions 16, 36
viruses 15
W
Windows Backup and Restore 29
Windows Connect to the Internet 
wizard 18
wired network connection 21
wireless Internet access 17
wireless network connection 18
wireless network problems, 
troubleshooting 37