HP ZBook Firefly 15 Maintenance and Service Guide - Page 120

Quick check, HP PC Hardware Diagnostics (UEFI) for video test, Display assembly diagram

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Quick check Use these steps to check the display. ● Visually examine the display for cracked screen, liquid crystal leak, dirty spots on glass, and other issues. ● Reset and update BIOS and docking firmware. ● Update operating system (OS), graphics or video drivers (Intel, AMD, NVIDIA, and others). For custom images, HP highly recommends upgrading or installing Windows in UEFI mode (or Legacy disabled) to fully support hybrid graphics and avoid unexpected behaviors (for example, blue screen error, graphics or video issues) in the BIOS Legacy setting. ● Configure Windows settings (Power options, Screen brightness, Personalization, Screen resolution, and so on). ● Test with a verified working external display. ● Boot to Windows in safe mode. ● Test with a verified working operating system (for instance, shipping image). HP PC Hardware Diagnostics (UEFI) for video test Use this tool to quickly determine if the display issue is related to a real hardware issue. To start HP PC Hardware Diagnostics (UEFI) (6. HP Hardware Diagnostics and Tools on page 78), when the computer is at boot, press the f2 key, select Component Tests, and then select Video. There are three options: ● Video Memory Check: to test video memory ● Palette Check: to test the three video color components (red, green, blue) ● Dead Pixel Check: to check dead pixels in eight different colors (Dead Pixel Check is available with the HP PC Diagnostics 3-in-1 USB Key tool) Review the video troubleshooting in the following Display section for specific issues and possible solutions. For additional information about display problems, see documentation provided by the product manufacturer. Display assembly diagram The display assembly diagram shows basic video components: system board, graphics cards, display cables, display connectors, operating system (OS), graphics driver, and LCD display panel. Any component or a combination of these components can contribute to a video issue. 106 Chapter 7 Troubleshooting guide

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Quick check
Use these steps to check the display.
●
Visually examine the display for cracked screen, liquid crystal leak, dirty spots on glass, and other
issues.
●
Reset and update BIOS and docking
firmware.
●
Update operating system (OS), graphics or video drivers (Intel, AMD, NVIDIA, and others).
For custom images, HP highly recommends upgrading or installing Windows in UEFI mode (or Legacy
disabled) to fully support hybrid graphics and avoid unexpected behaviors (for example, blue screen
error, graphics or video issues) in the BIOS Legacy setting.
●
Configure
Windows settings (Power options, Screen brightness, Personalization, Screen resolution, and
so on).
●
Test with a
verified
working external display.
●
Boot to Windows in safe mode.
●
Test with a
verified
working operating system (for instance, shipping image).
HP PC Hardware Diagnostics (UEFI) for video test
Use this tool to quickly determine if the display issue is related to a real hardware issue.
To start HP PC Hardware Diagnostics (UEFI) (
6. HP Hardware Diagnostics and Tools
on page
78
), when the
computer is at boot, press the
f2
key, select
Component Tests
, and then select
Video
.
There are three options:
●
Video Memory Check
: to test video memory
●
Palette Check
: to test the three video color components (red, green, blue)
●
Dead Pixel Check:
to check dead pixels in eight
different
colors (Dead Pixel Check is available with the
HP PC Diagnostics 3-in-1 USB Key tool)
Review the video troubleshooting in the following Display section for
specific
issues and possible solutions.
For additional information about display problems, see documentation provided by the product manufacturer.
Display assembly diagram
The display assembly diagram shows basic video components: system board, graphics cards, display cables,
display connectors, operating system (OS), graphics driver, and LCD display panel. Any component or a
combination of these components can contribute to a video issue.
106
Chapter 7
Troubleshooting guide