User's Guide

Table Of Contents
11 Using HP PC Hardware Diagnostics UEFI
HP PC Hardware Diagnostics UEFI (Unied Extensible Firmware Interface) 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.
NOTE: For Windows 10 S computers, you must use a Windows computer and a USB ash drive to download
and create the HP UEFI support environment because only .exe les are provided. For more information, see
Downloading HP PC Hardware Diagnostics UEFI to a USB ash drive on page 42.
If your PC does not start in Windows, you can use HP PC Hardware Diagnostics UEFI to diagnose hardware
issues.
Using an HP PC Hardware Diagnostics Windows hardware failure
ID code
When HP PC Hardware Diagnostics Windows detects a failure that requires hardware replacement, a 24-digit
Failure ID code is generated.
Depending on the instructions on the screen, choose one of these options:
If failure ID link is displayed, select the link and follow the on-screen instructions.
If instructions for calling support are displayed. Follow those instructions.
Starting HP PC Hardware Diagnostics UEFI
To start HP PC Hardware Diagnostics UEFI, follow this procedure.
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 ash drive
NOTE:
To download the HP PC Hardware Diagnostics UEFI tool to a USB ash drive, see
Downloading the latest HP PC Hardware Diagnostics UEFI version on page 43.
b
. Hard drive
c. BIOS
3. When the diagnostic tool opens, select a language, select the type of diagnostic test you want to run,
and then follow the on-screen instructions.
Downloading HP PC Hardware Diagnostics UEFI to a USB ash
drive
Downloading HP PC Hardware Diagnostics UEFI to a USB ash drive can be useful in some situations.
42 Chapter 11 Using HP PC Hardware Diagnostics UEFI