No USB in device manager

  • Thread starter Thread starter Joe
  • Start date Start date
J

Joe

On the more advanced of my two Dell machines, the Dell
Dimension XPS T650r, my USB ports are not working. Two USB
ports exist on the back of the machine. Nothing at all
shows in the Device Manager about USB. It's as if they
don't exist. There is no unknown devices, or other
devices. There is nothing at all. There is no USB Root
Hub. There is no Intel to PCI to USB Universal Host
Controller as there is on my other machine Dell Dimension T550.

I have examined the BIOS and enabled them there, and
rebooted with no success.

I have spent hours perusing microsoft's site and user
groups for insight and nothing that I found has brought
them to the attention of the device manager.

1) Can I load drivers to get them working?

2) Is there a test to determine if the necessary cards are
in place?

3) What do I look for when opening the machine up to see if
the USB cards even exist?

4) Why would such a machine come with the ports and no
supporting cards for plug and play?

Thanks, Joe
 
Mike and anyone else,

if you read below, you would have seen that I did mention
that I enabled the ports in the BIOS and still no evidence
at all in the software that the USB ports exist.

In BIOS:

Plug and Play O/S now set to [Yes] rather than [No]

Legacy USB ports [Enabled]

What else is missing? Anyone?
 
Mike or anyone else,

if you read below, you would have seen that I did mention
that I enabled the ports in the BIOS and still no evidence
at all via software that the USB ports exist.

In BIOS:

Plug and Play O/S now set to [Yes] rather than [No]

Legacy USB ports [Enabled]

What else is missing? Anyone?

Thanks, Joe
 
Joe said:
On the more advanced of my two Dell machines, the Dell
Dimension XPS T650r, my USB ports are not working. Two USB
ports exist on the back of the machine. Nothing at all
shows in the Device Manager about USB. It's as if they
don't exist. There is no unknown devices, or other
devices. There is nothing at all. There is no USB Root
Hub. There is no Intel to PCI to USB Universal Host
Controller as there is on my other machine Dell Dimension T550.

I have examined the BIOS and enabled them there, and
rebooted with no success.

I have spent hours perusing microsoft's site and user
groups for insight and nothing that I found has brought
them to the attention of the device manager.

1) Can I load drivers to get them working?
Click to expand...

Possibly. Do the USB ports show up in the hardware listing during the boot
sequence?
2) Is there a test to determine if the necessary cards are
in place?
Click to expand...

You might try and enable boot logging to see what's happening there.
3) What do I look for when opening the machine up to see if
the USB cards even exist?
Click to expand...

Not sure.
4) Why would such a machine come with the ports and no
supporting cards for plug and play?
Click to expand...

Because someone made a mistake building the machine? I guess I would check
website at Dell or the motherboard manufacturer to see if there is a BIOS
update or other issues, check the boot sequence, triple check that USB is
enabled in the BIOS, then get on the phone with Dell.

Hope this helps, I'm not a guru but maybe can point you to some things to
try.

Will Niccolls
 
In BIOS:

Plug and Play O/S now set to [Yes] rather than [No]

Here's a problem, you have to set this to No, as you want th
motherboard BIOS to resolve any conflicts, as WindowsXP can not. Man
people don not know this..

Legacy USB ports [Enabled]

Here's another problem, I've read in many forums and found fro
personel experience, to Enable this is to effectively kill your US
function all together! Definitely Disable Legacy Support.

What else is missing? Anyone?

Another tip: Look for in the BIOS for NVRAM or NRAM or VRAM (Depend
on manufacture) NVRAM Clear = No Change this to Yes and reboot. Thi
forces the MB to detect everything fresh. Make sure you do the firs
two settings first. This little tip works wonders for hardwar
conflicts. Good Luck, and enjoy.


-
moojo
 
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