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Onboard USB Ports not powering.

I'm working on this dell computer, and it does not recognize any device plugged into the usb ports. I've tried various mice and keyboards, and usb flashdrives. No difference. What may be some problems?
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mavcom
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mavcom
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3 Solutions
 
dbruntonCommented:
What model Dell computer?

Is this happening on startup with a USB keyboard plugged in and you can't use it to access the BIOS?

What happens if you boot from a Live Linux CD such as Ubuntu https://help.ubuntu.com/community/LiveCD  Can you use a USB keyboard or mouse with it?
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JohnnyCanuckCommented:
Disabled in BIOS, disabled by group policy, burnt out.  Does computer have PS/2 ports for mouse/keyboard?  Use PS/2 keyboard to enter BIOS setup and see if USB is disabled.  If the USB is enabled in BIOS, try booting a Linux Live CD such as Knoppix or Puppy.  This will show if the problem is with Windows or the hardware.

http://www.knopper.net/knoppix/index-en.html

http://puppylinux.org/main/Download%20Latest%20Release.htm
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JohnnyCanuckCommented:
Darn it dbrunton - I guess you type faster than me.
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rindiCommented:
Have you checked in the BIOS whether USB is enabled?

Have you tried booting from a LiveCD and does it act the same way? A good such CD is the UBCD, on which PartedMagic is included, which you can use to test this:

http://ultimatebootcd.com

If you have the same issues with Parted Magic, and USB is enabled in the BIOS, and this happens on all USB ports, then it's a hardware problem with the mainboard. get a USB addon card...
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Michael MachieFull-time technical multi-taskerCommented:
It could be related to your BIOS settings not having the USB devices enabled.
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nobusCommented:
look first in device manager, if the usb shows up -  without errors (that means it's installed )
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mavcomAuthor Commented:
Seems like MB
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nobusCommented:
that may be so, but it does not tell us what you tried; and what results
in order to get help here - answer all the posts plse
so, to start - does the usb show in Device manager - without errors?

you can test easily if the usb works - when you are booted from alive Knoppix cd:
ftp://mirrors.kernel.org/knoppix-dvd/KNOPPIX_V7.0.5DVD-2012-12-21-EN.iso
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mavcomAuthor Commented:
All of the above or a similar form were tried and it is definitely the MB
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