Page 116 from 164
Before removing the weight, follow these steps:
1.Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2.Disconnect all external devices connected to the computer.
3.Disconnect the power from the computer by first unplugging the power cord from the AC outlet and
then unplugging the AC adapter from the computer.
4.Remove the battery (see
Battery on page 49), and then remove the following components:
Service door (see
Service door on page 56)
WLAN module (see
WLAN module on page 59)
Hard drive (see
Hard drive on page 81)
Top cover (see
Top cover/keyboard on page 62)
USB board (see
USB board on page 80)
Display assembly (see
Display assembly on page 71)
System board (see
System board on page 85)
Remove the weight:
1.Remove the two Phillips PM2.5×6.5 screws (1) that secure the weight to the computer.
2.Remove the weight from the computer (2).
Reverse this procedure to install the weight.
108 Chapter 4 Removal and replacement procedures
Page 117 from 164
5 Using Setup Utility (BIOS) and HP PC
Hardware Diagnostics (UEFI) in Windows 8
Setup Utility, or Basic Input/Output System (BIOS), controls communication between all the input and output
devices on the system (such as disk drives, display, keyboard, mouse, and printer). Setup Utility (BIOS)
includes settings for the types of devices installed, the startup sequence of the computer, and the amount of
system and extended memory.
Starting Setup Utility (BIOS)
To start Setup Utility (BIOS), turn on or restart the computer, quickly press esc, and then press f10.
NOTE:Use extreme care when making changes in Setup Utility (BIOS). Errors can prevent the computer
from operating properly.
Updating the BIOS
Updated versions of the BIOS may be available on the HP website.
Most BIOS updates on the HP website are packaged in compressed files called SoftPaqs.
Some download packages contain a file named Readme.txt, which contains information regarding installing
and troubleshooting the file.
Determining the BIOS version
To determine whether available BIOS updates contain later BIOS versions than those currently installed on
the computer, you need to know the version of the system BIOS currently installed.
BIOS version information (also known as ROM date and System BIOS) can be revealed by pressing fn+esc (if
you are already in Windows) or by using Setup Utility (BIOS).
1.Start Setup Utility (BIOS) (see
Starting Setup Utility (BIOS) on page 109).
2.Use the arrow keys to select Main.
3.To exit Setup Utility (BIOS) without saving your changes, use the arrow keys to select Exit, select Exit
Discarding Changes, and then press enter.
Starting Setup Utility (BIOS) 109
Page 118 from 164
Downloading a BIOS update
CAUTION:To reduce the risk of damage to the computer or an unsuccessful installation, download and
install a BIOS update only when the computer is connected to reliable external power using the AC adapter.
Do not download or install a BIOS update while the computer is running on battery power, docked in an
optional docking device, or connected to an optional power source. During the download and installation,
follow these instructions:
Do not disconnect power from the computer by unplugging the power cord from the AC outlet.
Do not shut down the computer or initiate Sleep.
Do not insert, remove, connect, or disconnect any device, cable, or cord.
1.From the Start screen, type hp support assistant, and then select the HP Support Assistant
2.Click Updates and tune-ups, and then click Check for HP updates now.
3.Follow the on-screen instructions.
4.At the download area, follow these steps:
a.Identify the most recent BIOS update and compare it to the BIOS version currently installed on
your computer. If the update is more recent than your BIOS, make a note of the date, name, or
other identifier. You may need this information to locate the update later, after it has been
downloaded to your hard drive.
b.Follow the on-screen instructions to download your selection to the hard drive.
If the update is more recent than your BIOS, make a note of the path to the location on your hard
drive where the BIOS update is downloaded. You will need to access this path when you are ready
to install the update.
NOTE:If you connect your computer to a network, consult the network administrator before installing
any software updates, especially system BIOS updates.
BIOS installation procedures vary. Follow any instructions that are revealed on the screen after the download
is complete. If no instructions are revealed, follow these steps:
1.From the Start screen, type file, and then select File Explorer.
2.Click your hard drive designation. The hard drive designation is typically Local Disk (C:).
3.Using the hard drive path you recorded earlier, open the folder on your hard drive that contains the
4.Double-click the file that has an .exe extension (for example, filename.exe).
The BIOS installation begins.
5.Complete the installation by following the on-screen instructions.
NOTE:After a message on the screen reports a successful installation, you can delete the downloaded file
from your hard drive.
110 Chapter 5 Using Setup Utility (BIOS) and HP PC Hardware Diagnostics (UEFI) in Windows 8
Page 119 from 164
Using HP PC Hardware Diagnostics (UEFI)
HP PC Hardware Diagnostics is a Unified Extensible Firmware Interface (UEFI) that allows you to run
diagnostic tests to determine whether the computer hardware is functioning properly. The tool runs outside
the operating system so that it can isolate hardware failures from issues that are caused by the operating
system or other software components.
To start HP PC Hardware Diagnostics UEFI:
1.Turn on or restart the computer, quickly press esc, and then press f2.
The BIOS searches three places for the diagnostic tools, in the following order:
a.Connected USB drive
NOTE:To download the HP PC Hardware Diagnostics (UEFI) tool to a USB drive, see Downloading
HP PC Hardware Diagnostics (UEFI) to a USB device on page 111.
2.When the diagnostic tool opens, click the type of diagnostic test you want to run, and then follow the
NOTE:If you need to stop a diagnostic test, press esc.
Downloading HP PC Hardware Diagnostics (UEFI) to a USB device
NOTE:Instructions for downloading HP PC Hardware Diagnostics (UEFI) are provided in English only.
1.Go to http://www.hp.com.
2.Click Support & Drivers, and then click the Drivers & Downloads tab.
3.Enter the product name in the text box, and then click Go.
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) 111
Page 120 from 164
112 Chapter 5 Using Setup Utility (BIOS) and HP PC Hardware Diagnostics (UEFI) in Windows 8