HP ZBook Fury 17 G7, Maintenance And Service Manual, Page: 132 / 232

11. Test with minimum configuration
The factory-shipped computer (hardware configuration and preinstalled operating system image) is well tested
and ready for use. Therefore, using the original factory hardware configuration or booting to operating system
safe mode often resolves issues quickly.
● Disconnect any external USB storage, remove any discs in optical drives, remove the computer from a
docking station, remove external video, and others.
●
In addition to removing recently added components, you can narrow the issue down further with a
minimum configuration. For example, if HP PC Diagnostics reports a memory error, test one memory
module at a time to isolate the defective module.
● If the computer does not successfully boot the operating system, booting to safe mode may help identify
the following possible causes of the issue.
Essential hardware configuration
If none of the previous steps resolve the issue, start the computer with essential hardware only. The purpose is
to remove as much as hardware as possible while still maintaining the computer’s ability to turn on.
NOTE: This step is to be used by authorized service providers only. HP will not honor the warranty for a system
tested with the system board removed without the heat sink or fan.
This essential configuration is often used to troubleshoot power-on related issues, such as no-boot, reboot, and
freezing issues.
The essential hardware consists of the following components:
●
System board
● AC adapter (unplug nonremovable battery or remove battery)
● Processor (and heat sink or fan). (Processor may be integrated into the system board.)
● Memory (one verified working memory DIMM)
● Graphics card (if no VGA port is available on the system board). Platform may have both Intel integrated
graphics and discrete graphics. Therefore, you might not need a discrete graphics card.
●
External VGA monitor
● External USB keyboard
● External mouse
NOTE: After you remove the service door, disconnect all connections (internal keyboard, display, discrete GPU,
hard drive or solid-state drive, daughterboards, and so on) to achieve the essential hardware configuration. Do
not disassemble the system board from its enclosure at this time.
Reverse the previous procedure by reinstalling each piece of hardware removed, one piece at a time, and testing
your computer after each installation. Because your computer works with only the essential hardware installed,
those parts must be working properly. This means that one of the hardware components removed is causing the
computer to fail. By installing each device back into the computer and testing each time, you eventually identify
the failing hardware.
118 Chapter 7 Troubleshooting guide ENWW