152
Troubleshooting Your System
3
Restart the system and reconnect the USB devices.
If the problem is resolved, the problem was likely caused by an overcurrent
event on one of the USB devices. If the problem persists, attempt to isolate
the faulty device by trying different USB configurations.
If the problem is not resolved, proceed to the next step.
4
Reset the system BIOS to the default settings by setting the NVRAM
_CLR jumper inside your system. Use the following procedure.
CAUTION:
Many repairs may only be done by a certified service technician. You
should only perform troubleshooting and simple repairs as authorized in your
product documentation, or as directed by the online or telephone service and
support team. Damage due to servicing that is not authorized by Dell is not covered
by your warranty. Read and follow the safety instructions that came with the
product.
a
Turn off the system and attached peripherals and unplug the system
from the power source.
b
Open the system. See "Opening the System" on page 67.
c
Locate the NVRAM_CLR jumper on your system board (see
"Figure 6-1) and set the jumper to the enabled position.
d
Close the system. See "Closing the System" on page 68.
e
Reconnect the system and peripherals to power and restart.
If all USB devices are operational, proceed to the next step.
If the USB devices are still not functioning, see "Getting Help" on
page 181.
f
Repeat step 2 and step b.
g
Set the NVRAM_CLR jumper to the disabled position.
h
Close the system.
i
Reconnect the system and peripherals to power and restart.
j
Enter the System Setup program and reenter any custom BIOS
settings that were reset. Be sure to leave all USB ports enabled. See
"Using the System Setup Program" on page 45.
If the problem persists, see "Getting Help" on page 181.
Содержание PowerEdge HX574
Страница 1: ...Dell PowerEdge R905 Hardware Owner s Manual ...
Страница 10: ...10 Contents 7 Getting Help 181 Contacting Dell 181 Glossary 183 Index 195 ...
Страница 44: ...44 About Your System ...
Страница 62: ...62 Using the System Setup Program ...
Страница 144: ...144 Installing System Components ...
Страница 182: ...182 Getting Help ...
Страница 194: ...194 Glossary ...