HP Elitebook 840 G2 P0c57ut Aba 14 Notebook User Manual

4.Select your computer model, and then select your operating system.
5.In the Diagnostic section, click HP UEFI Support Environment.
– or –
Click Download, and then select Run.
Using HP PC Hardware Diagnostics (UEFI) (select models only)89 

13Using HP Sure Start
Using HP Sure Start (select models only)
Select computer models are configured with HP Sure Start, a technology that continuously monitors the 
computer's BIOS for attacks or corruption. If the BIOS becomes corrupted or is attacked, HP Sure Start 
automatically restores the BIOS to its previously safe state, without user intervention. HP Sure Start is  configured and already enabled so that most users can use the HP Sure Start default configuration. The 
default configuration...

14Support
Contacting support
If the information provided in this user guide or Help and Support does not address your questions, you can contact support. 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.
Here you can:
●Chat online with an HP technician.
NOTE:When support chat is not available in a particular language, it is available in English.
●Find support telephone numbers.
●Locate an HP service center....

Labels
The labels affixed to the computer provide information you may need when you troubleshoot system 
problems or travel internationally with the computer.
IMPORTANT:All labels described in this section will be located in one of 3 places depending on your 
computer model: affixed to the bottom of the computer, located in the battery bay, or under the service door.
●Service label—Provides important information to identify your computer. When contacting support, 
you will probably be asked for the...

15Specifications
●Input power
●Operating environment
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...

ATraveling with or shipping your computer
If you have to travel with or ship your computer, here are some tips to keep in mind to keep your equipment 
safe.
●Prepare the computer for traveling or shipping:
◦Back up your information to an external drive.
◦Remove all discs and all external media cards, such as memory cards, from the computer.
◦Turn off and then disconnect all external devices.
◦Shut down the computer.
●Take along a backup of your information. Keep the backup separate on the computer.
●When...

BTroubleshooting
Troubleshooting resources
●Access website links and additional information about the computer through Help and Support. To 
access Help and Support, select 
Start > Help and Support.
NOTE:Some checkup and repair tools require an Internet connection. HP also provides additional 
tools that do not require an Internet connection.
●Contact HP support. 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....

connected to the computer, the image can be displayed on the computer screen or the external display, 
or on both devices simultaneously. When you press 
fn+f4 repeatedly, the image alternates among the 
computer display, one or more external displays, and simultaneous display on all devices.
Software is functioning abnormally
If the software is unresponsive or responds abnormally, restart the computer. Click Start, click the arrow 
next to 
Shut down, and then select Restart. If you cannot restart the...

●To enable or disable a wireless or wired network device, right-click the Network Connection icon on the 
Windows desktop in the notification area, at the far right of the taskbar. To enable devices, select the 
check box from the menu option. To disable the device, clear the check box.
●Be sure that the wireless device is turned on.
●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...

The process of burning a disc does not begin, or it stops before completion
●Be sure that all other programs are closed.
●Turn off Sleep mode.
●Be sure that you are using the right kind of disc for your drive.
●Be sure that the disc is inserted properly.
●Select a slower write speed and try again.
●If you are copying a disc, save the information on the source disc to your hard drive before trying to burn 
the contents to a new disc, and then burn from your hard drive.
98Appendix B   Troubleshooting