HP Elite Dragonfly 13.5 Maintenance and Service Guide - Page 97

Electromagnetic Interference (EMI), No wake up, Use this information to troubleshoot EMI issues.

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Table 6-21 Issues, possible causes, and fixes (continued) Items Procedures 4. Run Hardware Diagnostics (6. HP Hardware Diagnostics and Tools on page 62) to isolate hardware issue. 5. Undo recent changes in Windows (5. Remove or uninstall recently added hardware, software on page 62). 6. Reseat cables and connections (10. Reseat cables and connections on page 69). 7. Start Windows in safe mode (11. Test with minimum configuration on page 70). 8. Use Startup Repair Windows to fix Windows damaged files. 9. Test with essential hardware configuration (11. Test with minimum configuration on page 70) with a verified working operating system (for instance, USB Windows-To-Go), if available, to isolate the software issue. Tips For more information, see http://support.hp.com/us-en/document/c03671001. Electromagnetic Interference (EMI) Use this information to troubleshoot EMI issues. Table 6-22 Issues, possible causes, and fixes Items Procedures Symptoms Possible causes System locks up, freezes in certain physical area or location Electromagnetic interference (EMI). Troubleshooting steps 1. See (2. Examine the environment on page 61). 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. No wake up Use this information to troubleshoot wake-up issues. Table 6-23 Issues, possible causes, and fixes Items Procedures Symptoms Possible causes When resuming from a power management state the computer may display: Power-saving mode; multiple-display setting. Troubleshooting steps 88 Chapter 6 Troubleshooting guide

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Table 6-21
Issues, possible causes, and fixes
(continued)
Items
Procedures
4.
Run Hardware Diagnostics (
6. HP Hardware Diagnostics and Tools
on page
62
)
to isolate hardware issue.
5.
Undo recent changes in Windows (
5. Remove or uninstall recently added
hardware, software
on page
62
).
6.
Reseat cables and connections (
10. Reseat cables and connections
on page
69
).
7.
Start Windows in safe mode (
11. Test with minimum
configuration
on page
70
).
8.
Use Startup Repair Windows to fix Windows damaged files.
9.
Test with essential hardware configuration (
11. Test with minimum
configuration
on page
70
) with a verified working operating system (for
instance, USB Windows-To-Go), if available, to isolate the software issue.
Tips
For more information, see
us-
en/
document/
c03671001
.
Electromagnetic Interference (EMI)
Use this information to troubleshoot EMI issues.
Table 6-22
Issues, possible causes, and fixes
Items
Procedures
Symptoms
System locks up, freezes in certain
physical area or location
Possible causes
Electromagnetic interference (EMI).
Troubleshooting steps
1.
See (
2. Examine the environment
on page
61
). 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.
No wake up
Use this information to troubleshoot wake-up issues.
Table 6-23
Issues, possible causes, and fixes
Items
Procedures
Symptoms
When resuming from a power
management state the computer may
display:
Possible causes
Power-saving mode; multiple-display setting.
Troubleshooting steps
88
Chapter 6
Troubleshooting guide