HP ProBook 630 Maintenance and Service Guide - Page 96

Incorrect or missing color/distorted image, Touch screen, Table 7-31

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Table 7-31 Issues, possible causes, and fixes (continued) Items Procedures 5. Test the monitor via internal ports (such as VGA, DP, HDMI, and others). 6. Verify that dock connectors of the notebook and the dock are clean, without dust, debris (for example, using air duster). 7. Ideally, use a verified working operating system or system connected to the dock to isolate the issue of the current operating system. 8. Ideally, use a verified working docking station to isolate the faulty dock. 9. Update latest dock firmware. Follow the installation instructions carefully. You may want to try a DP-to-VGA adapter if you have a distorted screen image. Connect the adapter to each DisplayPort of the dock. If you still cannot update the dock, attempt to update it on a confirmed working notebook before having the dock replaced. Note See the technical white paper titled "Multiple displays on HP ZBook Mobile Workstations" from HP platform support website. Go to http://h20195.www2.hp.com/v2/getpdf.aspx/ 4aa5-2657enw. Incorrect or missing color/distorted image Use this information to troubleshoot image issues. Table 7-32 Issues, possible causes, and fixes Items Procedures Symptoms Possible causes System works normally but the display shows: ● Missing or strange color ● Image distortion Loose connection, display cable, display, graphics card. Troubleshooting steps Verify with external monitor 1. Use combination fn + f4 to enable output to external monitor. 2. Close the lid. If the external monitor also shows incorrect color, it is graphics card issue. Test with a verified working graphics card. Verify monitor cable and cable connection (Monitor disassembly is required.) Be sure the monitor cables are not pinched or damaged. Be sure the monitor cables have good connection at both ends (system board and display panel). ● If moving cables affects the image, the monitor cable is the cause of the issue. Test with a confirmed working cable. ● If moving cables does not affect the image, the monitor has an issue. Test with a confirmed working monitor. Touch screen Use this information to troubleshoot touch screen issues. 84 Chapter 7 Troubleshooting guide

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Table 7-31
Issues, possible causes, and fixes (continued)
Items
Procedures
5.
Test the monitor via internal ports (such as VGA, DP, HDMI, and others).
6.
Verify that dock connectors of the notebook and the dock are clean, without dust,
debris (for example, using air duster).
7.
Ideally, use a verified working operating system or system connected to the dock to
isolate the issue of the current operating system.
8.
Ideally, use a verified working docking station to isolate the faulty dock.
9.
Update latest dock firmware. Follow the installation instructions carefully. You may
want to try a DP-to-VGA adapter if you have a distorted screen image. Connect the
adapter to each DisplayPort of the dock. If you still cannot update the dock, attempt to
update it on a confirmed working notebook before having the dock replaced.
Note
See the technical white paper titled “Multiple displays on HP ZBook Mobile Workstations”
from HP platform support website. Go to
v2/getpdf.aspx/
4aa5-2657enw
.
Incorrect or missing color/distorted image
Use this information to troubleshoot image issues.
Table 7-32
Issues, possible causes, and fixes
Items
Procedures
Symptoms
System works normally but the display
shows:
●
Missing or strange color
●
Image distortion
Possible causes
Loose connection, display cable, display, graphics card.
Troubleshooting steps
Verify with external monitor
1.
Use combination
fn + f4
to enable output to external monitor.
2.
Close the lid.
If the external monitor also shows incorrect color, it is graphics card issue. Test with a
verified working graphics card.
Verify monitor cable and cable connection
(Monitor disassembly is required.)
Be sure the monitor cables are not pinched or damaged.
Be sure the monitor cables have good connection at both ends (system board and display
panel).
●
If moving cables affects the image, the monitor cable is the cause of the issue. Test
with a confirmed working cable.
●
If moving cables does not affect the image, the monitor has an issue. Test with a
confirmed working monitor.
Touch screen
Use this information to troubleshoot touch screen issues.
84
Chapter 7
Troubleshooting guide