HP ZBook 17 Maintenance and Service Guide - Page 136
Electromagnetic Interference (EMI
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Items Procedures Tips and tricks 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 (8. Hard reset on page 102). 2. Perform soft reset (9. Soft reset (Default Settings) on page 103). 3. Update BIOS and drivers (4. Update BIOS and drivers on page 94). a. Roll back to previous version may be necessary. b. Go to safe mode to install drivers. 4. Run Hardware Diagnostics (6. HP Hardware Diagnostics and Tools on page 95) to isolate hardware issue. 5. Undo recent changes in Windows (5. Remove or uninstall recently added hardware, software on page 94). 6. Reseat cables and connections (10. Reseat cables and connections on page 103). 7. Start Windows in safe mode (11. Test with minimum configuration on page 104). 8. Use Startup Repair Windows to fix Windows damaged files. 9. Test with essential hardware configuration (11. Test with minimum configuration on page 104) along with a verified working operating system (i.e., USB Windows-To-Go ) if available to isolate the software issue. For more information, see http://support.hp.com/us-en/document/c03671001. Electromagnetic Interference (EMI) Items Symptoms System locks up, freezes in certain physical area or location Procedures Possible causes Electromagnetic interference (EMI). Troubleshooting steps 1. See (2. Examine the environment on page 93). Pay attention to external power source, 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. 122 Chapter 7 Troubleshooting guide