Touch Screen - HP ZBook 15u G5 Maintenance And Service Manual

Items

Touch screen

Items
Symptoms
Unresponsive
Inaccurate
Configure the touch display in Control Panel >
Tablet PC Settings
References
128 Chapter 8 Troubleshooting guide
Procedures
Be sure that external display cables have good connection at both ends (system board and
display panel).
● If moving cables affects the image, it is display cable. Test with a confirmed working
cable.
● If moving cables does not affect the image, is display issue. Test with a confirmed
working display
Procedures
Possible causes
Dirt and smudge, driver, touch display configuration, power management.
Troubleshooting steps
Quick check
Turn off the computer, spray glass cleaner onto a soft, damp cloth, and gently
wipe the screen to remove dirt and smudge.
NOTE: Do not spray cleaner directly onto the screen.
1. Restart the computer.
2. Verify touch screen and graphics drivers.
3. Configure the touch display to identify the screen as a touch screen as shown
in the image at left.
4. Calibrate the screen and reset if touch functionality is still not working
correctly.
5. Perform diagnostic test in HP Hardware Diagnostics under Component Tests
> Touch Screen.
If the diagnostics tests pass but the touch screen still does not respond,
continue following the steps.
6. Adjust the power management settings for your touch screen.
If the touch screen stops working after waking from sleep, adjust the power
management settings so that the touch screen device stays active while the
computer is in sleep mode.
7. Perform Microsoft System Restore and restore to a time when the system
was working.
8. Perform HP System Recovery if none of the above actions resolves the issue.
http://support.hp.com/us-en/document/c04789449
http://support.hp.com/us-en/document/c04676089