No Video (External); Displayport/Vga; Hdmi - HP ZBook 15 G4 Maintenance And Service Manual

No video (external)

Symptom
No image on external
monitor

DisplayPort/VGA

See No video (external) on page

HDMI

Symptoms
● Display issue
● Sound issue
References
116 Chapter 6 Troubleshooting guide
Possible causes
External monitor, resolution, display configuration, drivers.
Troubleshooting steps
1. Be sure external monitor is compatible with the
computer.
2. Be sure that external monitor is turned on.
3. Press any key to get out power saving mode.
4. Adjust the brightness of the monitor.
5. Test with a verified working monitor.
6. Test the monitor via internal ports (VGA, DP ports).
7. Install latest video driver.
8. Reset the screen resolution as described in the
documentation.
9. Configure display choice, and then force output to
external video by closing the notebook lid or pressing
Fn + F4 to switch screen output.
116.
Possible causes
Cable, connection, settings.
Troubleshooting steps
Quick Check
1. Verify HDMI device input source is set correctly (i.e., HDMI1).
2. Be sure you are using the correct HDMI cable.
3. Check connection and reconnect the HDMI cable.
4. Verify if sound output is configured correctly in Control Panel > Sound Manager.
1. Perform hard reset
2. Update BIOS and drivers
no video on HDTV.
HP Notebook PCs - Troubleshooting HDMI Display and Sound Issues:
en/document/c01186408
(4. Update BIOS and drivers on page
(4. Update BIOS and drivers on page
79).
79) when sound is heard but
http://support.hp.com/us-