Table 7-22
Issues, possible causes, and fixes (continued)
Items
Procedures
1.
2. Examine the environment on page 72
). 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 7-23
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 76
) is blinking (indicating Sleep state). Press
power button to exit Sleep.
2.
Reset BIOS to default (associated with OS Power Management in Power Menu) (
Update BIOS and drivers on page 72
)
3.
Check power management settings in Windows Power Options. Disable Sleep options if
the issue is resolved.
No wake up
99