HP EliteBook 820 G1, HP EliteBook 725 G2, & EliteBook 720 G1 Notebook PCs - Maintenance and Service Guide

Using HP PC Hardware Diagnostics (UEFI) (select models only)
HP PC Hardware Diagnostics is a Unified Extensible Firmware Interface (UEFI) that allows you to run
diagnostic tests to determine if the computer hardware is functioning properly. The tool runs outside of the
operating system to isolate hardware failures from issues that may be 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.
After pressing f2, the BIOS searches three places for the HP PC Hardware Diagnostics (UEFI) 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 133.
b. Hard drive
c. BIOS
2. Click 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 while it is running, press esc.
132 Chapter 7 Computer Setup (BIOS)