HP Elite Dragonfly 13.5 Maintenance and Service Guide - Page 101

Display, Display anomalies, Symptom, Horizontal lines because of video memory

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Display Use these sections to troubleshoot display issues. Display anomalies The display panel is a field-replaceable unit (FRU) and must be replaced by only authorized technicians. However, HP highly recommends that users and technicians observe symptoms and use the HP PC Hardware Diagnostics (UEFI) tool before any replacement. Symptom This section includes common display issues with symptoms: ● Blank or black video ● Incorrect color, missing color, distorted image ● 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 6-28 Display anomaly illustrations Display anomalies Cracked screen Cracked image Blurred image 92 Chapter 6 Troubleshooting guide

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Display
Use these sections to troubleshoot display issues.
Display anomalies
The display panel is a field-replaceable unit (FRU) and must be replaced by only authorized technicians.
However, HP highly recommends that users and technicians observe symptoms and use the HP PC Hardware
Diagnostics (UEFI) tool before any replacement.
Symptom
This section includes common display issues with symptoms:
●
Blank or black video
●
Incorrect color, missing color, distorted image
●
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 6-28
Display anomaly illustrations
Display anomalies
Cracked screen
Cracked image
Blurred image
92
Chapter 6
Troubleshooting guide