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Use your arrow keys or mouse to navigate the menus. Select if you are unsure of the cause (e.g., system is overheating or battery won't charge), or run individual Component Tests . 5. Interpreting Diagnostic Results and Failure Codes

If your computer won't boot or you suspect a physical failure (like a bad hard drive or RAM), this is the tool to use. Windows Version: For testing components while the OS is running. UEFI Version: Runs outside the OS—essential if Windows won't start. 4-in-1 USB Key:

Fixes driver conflicts and firewall blocks instantly.

Decodes cryptic hardware flashing lights into actionable errors.

This is the closest thing to a universal “HP service tool.”

Downloading repair utilities from unverified sources exposes your system to severe risks: