HP Pavilion Dv4 5100 Entertainment Notebook Pc Series Manual

Recovering the original system using HP Recovery Manager
HP Recovery Manager software allows you to repair or recover the computer to its original factory
state. 
What you need to know
●HP Recovery Manager recovers only software that was installed at the factory. For software not
provided with this computer, you must either download the software from the manufacturers
website or reinstall the software from the disc provided by the manufacturer.
●A system recovery should be used as a final attempt to...

Changing the computer boot order
To change the boot order for recovery discs:
1.Restart the computer.
2.Press esc while the computer is restarting, and then press f9 for boot options.
3.Select Internal CD/DVD ROM Drive from the boot options window.
To change the boot order for a recovery flash drive:
1.Insert the flash drive into a USB port.
2.Restart the computer.
3.Press esc while the computer is restarting, and then press f9 for boot options.
4.Select the flash drive from the boot options window.
82...

12 Specifications
Input power
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. The
AC power source must be rated at 100–240 V, 50–60 Hz. Although the computer can be powered
from a standalone DC power source, it should be powered only with an AC adapter or a DC power
source supplied and approved by HP for use with this computer.
The computer can operate on...

Operating environment
Factor Metric U.S.
Temperature
Operating5°C to 35°C41°F to 95°F
Nonoperating-20°C to 60°C-4°F to 140°F
Relative humidity (noncondensing)
Operating10% to 90%10% to 90%
Nonoperating5% 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
84 Chapter 12   Specifications 

13 Troubleshooting and support
●Troubleshooting
●
Contacting customer support
85 

Troubleshooting
Disc drive problems
If the disc tray fails to open normally, follow these steps:
1.Insert the end of a paper clip into the release access (1) in the front bezel of the drive.
2.Press in gently on the paper clip until the tray is released, and then pull out the tray (2) until it
stops.
3.Remove the disc (3) from the tray by gently pressing down on the spindle while lifting the outer
edges of the disc. Hold the disc by the edges and avoid touching the flat surfaces.
NOTE:If the tray is not...

Cannot connect to a WLAN
If you have a problem connecting to a WLAN, confirm that the integrated WLAN device is turned on
and properly installed on your computer:
1.If the wireless light is off or amber, press the wireless button, wireless switch, or wireless key to
turn it on.
NOTE:If the wireless light is off and your turn it on, try connecting to the WLAN again. If that
does not work, follow the steps below.
2.Select Start > Control Panel > System and Security.
3.In the System area, click Device...

Some networks change the SSID or network keys used in their routers or access points on a
regular basis to improve security. You must change the corresponding code in your computer
accordingly.
If you are provided with new wireless network keys and SSID for a network, and if you have
previously connected to that network, follow the steps below to connect to the network:
1.Select Start > Control Panel > Network and Internet > Network and Sharing Center.
2.In the left panel, click Manage wireless...

Get the latest version of the WLAN device software and drivers for your computer from the HP
website at 
http://www.hp.com. If the WLAN device you are using was purchased separately, consult
the manufacturers website for the latest software.
To get the latest version of the WLAN device software for your computer, follow these steps:
1.Open your Internet browser.
2.For U.S. support, go to 
http://www.hp.com/go/contactHP. For worldwide support, go to http://
welcome.hp.com/country/us/en/wwcontact_us.html....

Resolving a low battery level when no power source is available
●Initiate Hibernation.
●Save your work and shut down the computer.
Resolving a low battery level when the computer cannot exit Hibernation
When the computer lacks sufficient power to exit Hibernation, follow these steps:
1.Replace the discharged user-replaceable battery with a charged battery, or connect the AC
adapter to the computer and to external power.
2.Exit Hibernation by pressing the power button.
Troubleshooting an AC adapter
Test...