Re: USB DEVICES PROBLEM WITH WINDOWS XP SP3!!!

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

oc9ine wrote:
Paul wrote:
smlunatick wrote:
On Dec 10, 3:03 pm, oc9ine <oc9...@xxxxxxxxx> wrote:
I will try your first point but plz try finding your forum link.

First thing I'd try is to copy the Windows usbstor.sys file from a
known working machine to the dodgy one, I had exactly the same problem
and this fixed it for me on one occasion.
On a different occasion on a different machine with the same symtoms
fixing was much more hassle, had to wade into the registry and check
the user priviliges for the USB ports or somesuch. I'll see if I've
still got the link to the forum discussion I found on the subject.

Clear out the Unknown entries and disconnect the flash drive. Then,
re-attempt to connect the flash drive. If this is still coming up as
"Unknown" then you might have a physical "hardware" problem with the
actual USB ports.

I'd be curious what UVCView shows in the right hand window pane,
when you plug in an "unknown" device. UVCView is available here.
It was formerly offered for download from Microsoft, but
was removed.

*******
ftp://ftp.efo.ru/pub/ftdichip/Utilities/UVCView.x86.exe
http://www.users.on.net/~fzabkar/USB_IDs/UVCView.x86.exe

File size is 167,232 bytes.
MD5sum is 93244d84d79314898e62d21cecc4ca5e

This is a picture of what the UVCView info looks like.

http://www.die.de/blog/content/binary/usbview.png

Some information on the parameters seen in UVCView.

http://www.beyondlogic.org/usbnutshell/usb5.htm
*******

Paul



Dear Paul,

I installed UVCView on my system and it reported my usb pen drive as

-Unknown Device:FailedEnumeration

Now what can I do plz help me further my usb pen drive is working fine on other systems with same configuration.


That means -

1) The USB pen drive was detected as being electrically connected.
That triggered an attempt to enumerate it.

2) The enumeration failed to communicate with the USB pen drive, to
get configuration information from it. This could be a hardware
problem with the motherboard. (As long as the USB pen drive works
on another computer, then you know it isn't the pen drive.)

As a means to investigate the situation, and distinguish between a
motherboard hardware problem, and some other (Software?) issue,
I'd probably plug a PCI USB2 card into the motherboard, and test
the USB pen drive using that card. If that works, and the Southbridge
controlled ports continue to give "Unknown Device", it could be the
Southbridge USB ports that have a hardware problem.

I downloaded the D845GVSR_TechProdSpec.pdf file from Intel web site,
and that motherboard uses ICH4. There is one known issue with ICH4,
which I've never actually been able to find a case in practice. Maybe
your problem is related to the mythical ICH4 ESD problem ? I somehow
doubt it, having not succeed in finding any evidence of this. ICH5
on the other hand, has ample examples of a problem. So of the
two chips mentioned in this article, I've seen probably 20 postings
involving damaged motherboards with ICH5. And so far, no matching
symptoms on an ICH4 based motherboard.

http://tw2005.giga-byte.com/Motherboard/Support/FAQ/FAQ_456.htm

In the case of ICH5 with that failure, there are two sets of
symptoms. A "partial" failure, causes the USB ports to be
completely non-responsive (not even "Unknown Device"). In
a "full" failure, the motherboard will no longer run, and will
fail to boot on the next attempt. A "full" failure has visible
symptoms too, like this. Once the burn mark appears, this
Southbridge has to be changed.

Burned ICH5 (possibly ESD latchup failure, "PNPN" across USB power pads)
http://farm1.static.flickr.com/99/306837150_34ecdbc9b4_o.jpg

http://en.wikipedia.org/wiki/Latchup

I've not heard of anyone experiencing the same symptoms with
ICH4, but maybe what you're seeing is how a problem is
manifested with ICH4. If you try a PCI USB2 card, that
will use a different controlling interface chip, and will
help determine whether the problem is software or not.

Paul

.

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