9 Using HP PC Hardware Diagnostics (UEFI)
HP PC Hardware Diagnostics is a Unied 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.
When HP PC Hardware Diagnostics (UEFI) detects a failure that requires hardware replacement, a 24-digit 
Failure ID code is generated. This ID code can then be provided to support to help determine how to correct 
the problem.
NOTE: To start diagnostics on a convertible computer, your computer must be in notebook mode and you 
must use the keyboard attached.
To start HP PC Hardware Diagnostics (UEFI), follow these steps:
1. Turn on or restart the computer, and quickly press esc.
2. 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 77.
b. Hard drive
c. BIOS
3. When the diagnostic tool opens, select the type of diagnostic test you want to run, and then follow the 
on-screen instructions.
NOTE: If you need to stop a diagnostic test, press esc.
Downloading HP PC Hardware Diagnostics (UEFI) to a USB device
NOTE: The HP PC Hardware Diagnostics (UEFI) download instructions are provided in English only, and you 
must use a Windows computer to download and create the HP UEFI support environment because only .exe 
les are oered.
There are two options to download HP PC Hardware Diagnostics to a USB device.
Download the latest UEFI version
1. Go to http://www.hp.com/go/techcenter/pcdiags. The HP PC Diagnostics home page is displayed.
2. In the HP PC Hardware Diagnostics section, select the Download link, and then select Run.
Download any version of UEFI for a specic product
1. Go to http://www.hp.com/support.
2. Select Get software and drivers.
Downloading HP PC Hardware Diagnostics (UEFI) to a USB device 77