HP ZBook Studio x360 Maintenance and Service Guide - Page 123

HP PC Hardware Diagnostics (UEFI) for video test, HP PC Diagnostics 3-in-1 USB Key tool

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● Test with a verified working external display. ● Boot to Windows in safe mode. ● Test with a verified working operating system (i.e., 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 80), 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 Display section below for specific issues and possible solutions. For additional information about display problems, refer to documentation provided by the product manufacturer. Common issues and possible solutions 111

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●
Test with a
verified
working external display.
●
Boot to Windows in safe mode.
●
Test with a
verified
working operating system (i.e., 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
80
), 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 Display section below for
specific
issues and possible solutions. For
additional information about display problems, refer to documentation provided by the product
manufacturer.
Common issues and possible solutions
111