Electromagnetic Interference (Emi) - HP ZBook 17 G4 Mobile Workstation Maintenance And Service Manual

Tips and tricks

Electromagnetic Interference (EMI)

Symptoms
System locks up, freezes in certain
physical area or location
Troubleshooting steps
Follow suggested steps below one at a time to verify normal boot process:
1. Disconnect all external peripherals, and perform a hard reset
on page 90).
2. Perform soft reset
3. Update BIOS and drivers
a. Roll back to previous version may be necessary.
b. Go to safe mode to install drivers.
4. Run Hardware Diagnostics
to isolate hardware issue.
5. Undo recent changes in Windows
hardware, software on page
6. Reseat cables and connections
on page 91).
7. Start Windows in safe mode
on page 92).
8. Use Startup Repair Windows to fix Windows damaged files.
9. Test with essential hardware configuration
configuration on page
USB Windows-To-Go ) if available to isolate the software issue.
For more information, see "HP PCs - Using Task Manager (Windows 10, 8)" at
http://support.hp.com/us-en/document/c03671001.
Possible causes
Electromagnetic interference (EMI).
Troubleshooting steps
1. See (2. Examine the environment on page
high-frequency signals such as cell phones, microwave ovens.
2. Move the computer to different locations nearby to determine where it fails and where it
does not fail.
3. Test with a verified working computer in original factory configuration.
4. Consult with support.
(9. Soft reset (Default Settings) on page
(4. Update BIOS and drivers on page
(6. HP Hardware Diagnostics and Tools on page
(5. Remove or uninstall recently added
80).
(10. Reseat cables and connections
(11. Test with minimum configuration
(11. Test with minimum
92) along with a verified working operating system (i.e.,
79). Pay attention to external power source,
Common issues and possible solutions 111
(8. Hard reset
91).
80).
81)