If you're having problems with USB ports, read on...

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truelove

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i'm reading that alot of people on here are having problems with their front (or top) usb on their cases not working with their k7n2 boards.  i have come across the correct solution to this problem in one of the posts (after having solved the problem on my own), however noone has posted the solution by itself on this forum so everyone can easily see it.

The trick is to make sure that pin 10 (at least on a K7n2 delta-L), the pin labeled USBOC (USB Open Connection), is wired to NOTHING.  If the connector to your front usb ports is fused into one giant connector and it HAS a wire that will connect to this pin (labeled GND2 or Shield or something), CUT THAT WIRE.  Pin 10 on JUSB2 (at least on a K7n2 delta-L) must be OPEN.  If this pin IS connected to something (even if it is only GND), the motherboard will think something is connected to this usb port and you will get many unknown devices listed in your windows device manager and the rest of your usb ports may or may not work.

As a general rule of thumb, if a pin on a motherboard is labeled OC for "Open Connection" and you wire something to it, you're asking for trouble.

If you cannot understand this you should not be attempting to wire a motherboard in the first place.  ;)

Here is a picture to go along with this discussion.  If you cannot see this picture, I am sorry for it has probably been removed from the place I posted it online as I cannot attach pictures physically to this post.  If someone here has a way to permanently host this picture and post it to this thread permanently, that would be wonderful.

In summary: all usb ports/headers have only four pins associated with it (VCC, USB+, USB-, GND).  If the connector (whether it's one big connector or individual sockets) to your front/top usb port has 5 sockets, don't connect the 5th socket to anything.  That goes for any case/motherboard combination.  This is what i'm talking about above.  I have no idea why motherboard and case manufacturers have a 5th pin involved in any way on either the pin or socket side.  It is not used for usb.

EDIT:  I just noticed this has already been discussed in the trouble shooting guide in the above sticky post.  oh well, now we have a pretty picture to go along with it (i hope).

 

Raven

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Originally posted by truelove
the pin labeled USBOC (USB Open Connection), is wired to NOTHING.
i have seen that wire called usb over current.

NOTE.
if you cut the wire make sure to insulate it too.
also sometimes a wire can be pulled out of a block if a little needle is used to lift a little plastic piece that locks it in place.

not a bad picture.
 

Frankenputer

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With Antec cases, there is a tab you can lift to pull the wire out (better than cutting). But , as Raven stated, insulate the exposed wire with electrical tape.
I even folded it back and wrapped mine.

This USB issue is not limited to this board and a single case manufacturer. This is effecting many boards and many different brands of cases.


Edit: We seem to be getting a lot of posts concerning this issue. Maybe this post or another should be made into a sticky in the "Good Articles Forum" or "AUS."
 
T

truelove

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Originally posted by Raven
Originally posted by truelove
the pin labeled USBOC (USB Open Connection), is wired to NOTHING.
i have seen that wire called usb over current.

NOTE.
if you cut the wire make sure to insulate it too.
also sometimes a wire can be pulled out of a block if a little needle is used to lift a little plastic piece that locks it in place.

not a bad picture.
ah yes, 'over current'. you may be right. anyway, that still does not change the fact that is must be left open. ;)
 

Raven

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the usb wires on my antec sonata didnt came in a big block so it was easy to install them and get them to work.
 
T

truelove

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Originally posted by Raven
the usb wires on my antec sonata didnt came in a big block so it was easy to install them and get them to work.
same with my brother's case. so i had the pleasure of finding this out with my case after i'd had no problems with my brothers. :undecided: ;)
 

Raven

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truelove.
is it okej if i take your image and include it inmy trouble shoot guide ?
 

D Engr

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Is this applicable for 865PE Neo2 PFISR motherboard?

I have WinXP SP1 installed and my USB 2.0 Flash drive can't be detected by Windows when I plug it on the front panel but will work once I plug it on the rear USB panels.
 

Raven

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Originally posted by D Engr
Is this applicable for 865PE Neo2 PFISR motherboard?

I have WinXP SP1 installed and my USB 2.0 Flash drive can't be detected by Windows when I plug it on the front panel but will work once I plug it on the rear USB panels.
it has nothing do to if its amd or intel.
asus or msi.
it has to do how usb works.
remove the usboc wire.
 

Raven

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Axel im going to include the image in my trouble shoot guide in the next update.
 
J

jjscram

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on my lanboy it is called a ground. raven you right on leaving the wire off on antec cases. last i new there was no stanard for usb connection to on the motherboard.
 

Raven

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its on all cases.
not only antec.

also if you remove ground it will not work.

i got 1 ground for 1 usb channel.
that makes it 2 grounds in total.
 

D Engr

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thanks.

I've checked the inside of my case and there's no wire connected to pins 9 and 10.

but still "device not recognized" pops in the system tray when I plug my USB 2.0 Flash drive. other devices work like my USB to infrared adapter.
 
M

matchload

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I have the same confusion with my lanboy and the Neo2. Can anyone tell me where the front panel USB wires actually go? Which one does not get hooked up out of the five?
 
N

NeoFrank

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Thanks for the heads up with the connection of pin 10 on the USB connector. I have a K8N Neo w/ AMD Athlon 64 and an Antec Silencio case. Front panel USBs (Antec) OR rear panel (MSI) USBs were not working. After reading your post, I found the front panel connector did indeed have pin 10 (brown) lead connected. I removed it and both front and back are now fiunctioning! Good call! Thanks for an excellent diagram and clear diagnosis of the problem.
NeoFrank
 

maons

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I noticed that my USB2 port doesn't have the same pin configuration... as what you posted. I'm wondering if the manual has an error.

Look at ms-6330 version 5.0 and note the pins on the jusb2 port...

Thanks
 
C

CBHedricks

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This is weird! I have tried it both ways and I see the difference. I have the ANTEC Sonata 'Piano Black' case with the MSI K8T800 Neo FSR (MSI-6702) and the connector is the problem.

FIRST:

Thanks for the informaiton!!!!!

Secondly, If you really dig into the header description on the USB.org site you will find that the 10th pin is for 'overcurrent' sensor link ment for daughter card or other USB device that has the overcurrent (read fuse) present on the daughter card. If you fuse is blown on the card it will shut down the USB path on the motherboard. On my system the USB ports would work in USB1 mode but not for USB2. There appears to be a signal or voltage return on that pin when connected. That might be what is causing the issues.

Thanks again for the excelent work on this issue.
 
H

Hammaren

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Thanks a lot for this info. I just cut the shield cable and now I have 6 working USB ports instead of 2.
K8 Platinium Neo with Antec sonata chassie

:biggthumbsup:
 
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