HP ProBook 630 Maintenance and Service Guide - Page 92

Quick check, Reset and update BIOS and docking firmware.

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● Flickering image ● Vertical lines (because of LDVS, decreased signal integrity, and data loss) ● Dead pixel (because of display liquid, internal transistor, and others) ● Horizontal lines (because of video memory) ● Distorted when hot (because of thermal issue) ● Cracked screen/image (physical damage) ● Light leakage/bleeding Contact support for assistance. ● Humming noise (due to frequency settings) Contact support for assistance. Table 7-27 Display anomaly illustrations Display anomalies Cracked screen Cracked image Blurred image Dead pixel Vertical lines Horizontal lines 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. 80 Chapter 7 Troubleshooting guide

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●
Flickering image
●
Vertical lines (because of LDVS, decreased signal integrity, and data loss)
●
Dead pixel (because of display liquid, internal transistor, and others)
●
Horizontal lines (because of video memory)
●
Distorted when hot (because of thermal issue)
●
Cracked screen/image (physical damage)
●
Light leakage/bleeding
Contact support for assistance.
●
Humming noise (due to frequency settings)
Contact support for assistance.
Table 7-27
Display anomaly illustrations
Display anomalies
Cracked screen
Cracked image
Blurred image
Dead pixel
Vertical lines
Horizontal lines
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.
80
Chapter 7
Troubleshooting guide