HP ProBook 630 Maintenance and Service Guide - Page 88

Electromagnetic Interference (EMI), No wake up, Table 7-20

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Table 7-20 Issues, possible causes, and fixes (continued) Items Procedures 9. Test with essential hardware configuration (11. Test with minimum configuration on page 60) 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 7-21 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 52). 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 7-22 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 ● Blank screen ● Some light activity 1. Verify that front power light (7. Status lights, blinking light codes, troubleshooting lights, and POST error messages on page 55) is blinking (indicating Sleep state). Press power button to exit Sleep. 2. Reset BIOS to default (associated with OS Power Management in Power Menu) (4. Update BIOS and drivers on page 52) 3. Check power management settings in Windows Power Options. Disable Sleep options if the issue is resolved. 76 Chapter 7 Troubleshooting guide

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Table 7-20
Issues, possible causes, and fixes (continued)
Items
Procedures
9.
Test with essential hardware configuration (
11. Test with minimum
configuration
on page
60
) 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 7-21
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
52
). 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 7-22
Issues, possible causes, and fixes
Items
Procedures
Symptoms
When resuming from a power
management state the computer may
display:
●
Blank screen
●
Some light activity
Possible causes
Power-saving mode; multiple-display setting.
Troubleshooting steps
1.
Verify that front power light (
7. Status lights, blinking light codes, troubleshooting
lights, and POST error messages
on page
55
) is blinking (indicating Sleep state). Press
power button to exit Sleep.
2.
Reset BIOS to default (associated with
OS Power Management
in
Power Menu
) (
4.
Update BIOS and drivers
on page
52
)
3.
Check power management settings in Windows
Power Options
. Disable Sleep options if
the issue is resolved.
76
Chapter 7
Troubleshooting guide