HP 240 Maintenance And Service Manual page 117

To start Advanced System Diagnostics:
1. Turn on or restart the computer. While the "Press the ESC key for Startup Menu" message is
displayed in the lower-left corner of the screen, press esc. When the Startup Menu is displayed,
press f2.
2. Click the diagnostic test you want to run, and then follow the on-screen instructions.
NOTE: If you need to stop a diagnostics test while it is running, press esc.
Windows 8 – Computer Setup (BIOS) and Advanced System Diagnostics 109