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Author Topic: If you're having problems with USB ports, read on...  (Read 173516 times)

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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).

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Raven

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  • Quote
    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.

    Mike

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    « Reply #2 on: 12-August-04, 15:04:08 »
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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."
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    truelove

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    Quote
    Originally posted by Raven
    Quote
    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.  ;)
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    Raven

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    « Reply #4 on: 12-August-04, 16:15:06 »
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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.

    truelove

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    « Reply #5 on: 12-August-04, 17:30:44 »

    Quote
    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: ;-))
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    Raven

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    « Reply #6 on: 14-August-04, 08:28:36 »
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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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    « Reply #7 on: 17-September-04, 19:04:44 »
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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.
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    Raven

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    « Reply #8 on: 17-September-04, 19:07:57 »
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  • Quote
    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.

    axeluktoo

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    « Reply #9 on: 18-September-04, 00:21:06 »
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  • Hi,

    Good Post Truelove! Very informative!!!  :biggthumbsup:

    Axel  :-D)
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    « Reply #10 on: 18-September-04, 05:42:44 »
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  • Axel im going to include the image in my trouble shoot guide in the next update.

    jjscram

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    « Reply #11 on: 18-September-04, 09:29:22 »

    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.
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    Raven

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    « Reply #12 on: 18-September-04, 12:59:01 »
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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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    « Reply #13 on: 19-September-04, 15:45:05 »
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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.
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    « Reply #14 on: 20-September-04, 00:47:01 »

    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?
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    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
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    maons

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    « Reply #16 on: 29-November-04, 01:33:27 »
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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
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    Wonkanoby

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    « Reply #17 on: 29-November-04, 02:45:14 »
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  • http://www.msi.com.tw/program/products/mainboard/mbd/pro_mbd_detail.php?UID=24

    i think you will find thats usb 1 not 2

    and the drg shows just the 8 wires

    so connecting it should be easier
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    « Reply #18 on: 10-December-04, 12:04:35 »

    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.
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    Hammaren

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    Weeeee
    « Reply #19 on: 12-December-04, 08:16:52 »

    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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    Wicket-

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    « Reply #20 on: 19-December-04, 23:06:21 »

    I've never had a problem with an MSI mainboard in the past and I have installed hundreds of them, its what I do.  But after searching for hours and finally finding that the Front USB port is the cause of the system not powering up I was baffelled.

    I use Auriga Midi Tower Cases mainly and this 2168B was no exception.  I changed the Front USB connector and still have the same problem.  There are only 8 pins for 2 USB channels at the front.  There is no OC connector or wire here.  Unless it is grounded right at the front of the case.

    I will check this out and if anyone else has any bright ideas please post.

    Wicket Of Endor
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    jto

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    Thanks !!!!!!!!!!
    « Reply #21 on: 12-January-05, 13:56:00 »

    You just solved a problem that had me stumped!  I had no front case USB and no USB from the rear USB adapter, only the two ream MB connhectors. The problem was the pin 10 wire on the front case connector. That also disabled the other on MB connector!  One clip and I have six more USB ports.  Sincere thanks.  Why do they do that???????????????
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    CBHedricks

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    « Reply #22 on: 12-January-05, 14:05:32 »

    Not all manufactures will follow the specs on USB to the letter.  I have researched this intensly and have yet to find anyone that will mention it in the User Manuals of their products.  My own issue with MSI not responding to email was resolved when I called about a different problem (video card HSF died).  The Tech that I talked with apologized profusely, but was unable to give me a definitive reason why it was not mentioned in the users guide.  There will be a addition to them in the near furture supposedly.

    Anyways - Good luck and stay tuned.  If I find out more information I wll be sure to post it.  Also check out the CPU Forums for more good information.

    Later.

    Brad.
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    npk06

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    USB 2.0 front connectors freeze
    « Reply #23 on: 20-January-05, 16:58:14 »

    Hello guys,

    working in a university, I recently bought for one of our departments 60 MSI mainboards (model i865PE Neo2-V). Now that we installed the PCs, we just discovered this USB problem... when you connect a USB 2.0 device on the front connector, the system (Win 2000) hangs and stops responding but it works fine on the rear connectors.

    This is quite a big issue for us as USB mass storage flash disks are the main (I should say the only one) storage media we allow our students to use. Of course they also can use the 3"5 floppy disks but well....  :-D)

    I'll try to unwire pin 10 tomorrow (it's currently wired to the shield end of the front connector cable) and if that works, I'll thank you gratefully tomorrow... and will probably damn MSI for a hundred years for not mentionning this in the "user manual" provided with the mainboard cause I'll have to open 60 cases thanks to this lack of information despite it seems to be a known issue...  :angryfire:

    Anyway thank you for the input, and stay tuned for the answer...

    Regards
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    Mike

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    « Reply #24 on: 20-January-05, 19:59:14 »
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  • Actually, it's the case manufacturers fault rather than MSI (although, why the #10 pin isn't electrically isolated...). The case manufacturers are including this 9th wire to the #10 pin which is unneccessary with using the Intel USB spec. I kinow Gigabyte uses a different layout.
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    « Reply #25 on: 21-January-05, 19:23:04 »

    :-D)Hello guys,

    as promised I come back here to give the results of my tests... and I have to say that you saved my day (even if I had to open back 60 secured cases).

    So the solution was the right one, when I unplugged the "ground" end of the front USB connector cable from the USBOC pin, those connectors finally worked as expected with USB 2.0 compliant devices.

    So thank you really much for this very usefull information !

    And even if maybe it's not only MSI's fault, I still believe that more information on those connectors in the user's manual would be really usefull (who knows what USBOC means except a few people and who could imagine that pluggin on it a "ground" cable would make it unserviceable ??). And who ever saw a user's manual bundled with a case ?? it's pretty unusual   :-P)

    Hope that someone at MSI will read that and take it into consideration, not for me (because now I'm aware) but for the thousands other consumers that will feel a little bit "annoyed" with that issue. I don't think that adding one line about it in user's manuals would be so much expensive  ;-))

    But I'm quite lucky myself... being able to understand and write english (even if I still have some progress to do  :-D)) gave me the possibility to find the solution... but a lot of my french fellows can't do that... and there's no french forum here... How can they do ? They rely on user's manual ;-))

    Best regards,

    Nicolas
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    « Reply #26 on: 22-January-05, 00:04:11 »
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  • Quote
    Originally posted by npk06
    ... And who ever saw a user's manual bundled with a case ?? it's pretty unusual   :-P)...

    Actually, my antec case came with a manual.
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    « Reply #27 on: 22-January-05, 23:10:07 »
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  • so this OC lead to nul the ports when using both 2.0 USB port at same time.
    PCI header came with a sticker covering second 2.0port for that reason
    to pervent overload.

    OC pin is idiot proofing when wired correctly so beware not to overload when cut wire
    Quote
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    BECAUSE the BLUETOOTH connector shares the USB inface with onboard USB pinheader. the USB port coverd by a sticker will not function when you attach a bluetooth module to this connector.
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    « Reply #28 on: 25-January-05, 20:12:22 »

    As you can see over there [KT4V-L MS-6712] USB 2.0 & Win2k pilots , I really pulled my hair off as this damn bug can't possibily be spot if the user manual is dumb about it !!!!

    I didn't reinstall this box for a very long time and this :censored: bug is the only thing which got me on my knees !  :angryfire:
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    Forgeman

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  •  :biggthumbsup:

    Great posting!  Wish I'd read this a couple of days ago - and saved myself a lot of hassle.

    I've just bought a Neo2 Platinum board (MS-7028) designed for Intel processors and have the same problem.  If I connected a USB device to ANY of the ports connected to ANY header on the mb, the system would hang.  Occasionally I'd also get a Windows error message, "A USB device has malfunctioned and exceeded the power limits of its hub ports.  You should disconnect the device."  The four rear-facing USB connectors on the mb were unaffected.

    My case is a Termaltake Tsunami and has two flat connector plugs on the two front-facing USB leads.  After reading this posting I checked and all 5 pins in both connectors are wired.  Both flat connectors have to plug into the same USB connector on the mb.  As it turns out, plug 1 on row 1 is OK because of the missing pin 9 but row 2 was the culprit because all 5 header pins were connected.  Disconnecting USBOC and taping the wire back has solved my problem.

    MSI support (UK) blamed SP2 saying, "Windows XP service pack 2 has stricter (power) requirement than pack 1".  This clearly wasn't the cause of my problems.  I would suggest MSI revise the motherboard manual to mention this.

    Thanks once again.
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    Wow, great information, thank you! Any time now I have problems with USB that will be first thing I check!
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  • on my mobo, there is only 9 pins, and using the tsunami casing, The top panel USB are 2:
    USB1
    USB2

    Since there is only 9 pins, the USB 1, the 5th does not connect  to the USBOC thing/there is no 5th pin. So I did not cut the wire for this one. Is it ok? For USB2, there are 5 pins, I just gvut the wire going to USBOC, the 5th wire. Tried 1.1 it works. I have trouble finding 2.0 devices now.
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  • on my mobo, there is only 9 pins, and using the tsunami casing, The top panel USB are 2:
    USB1
    USB2

    Since there is only 9 pins, the USB 1, the 5th does not connect to the USBOC thing/there is no 5th pin. So I did not cut the wire for this one. Is it ok? For USB2, there are 5 pins, I just gvut the wire going to USBOC, the 5th wire. Tried 1.1 it works. I have trouble finding 2.0 devices now.



    Assuming both your top panel USB cables are plugged in to the same USB header on the mb, this should work.  AFAICR, mine are plugged in to JUSB2 and I have the D-Bracket USB connector plugged in to JUSB1.  Mine both work and I did not disable USBOC on USB1.

    I can't understand why 1.1 devices should work OK but you are having trouble with USB 2.0 devices.  Have you checked your BIOS settings?
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    chrissp26

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  • I have the CMStacker and have the front USB 2.0 ports installed. I'm having problems with the rear devices (Saitek Gamers Keyboard and Razer Diamondback mouse). Would it help by following the instructions above? I don't really want to cut a wire to find that I didn't need to.

    Thanks

    Chris
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    GC61

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    USB Problem
    « Reply #34 on: 04-May-05, 13:06:03 »

    I had gotten a reply from you in another message area and couldn't find a way to start a new thread.

    I've been thru every message in this area at least 100 times. I understand that some have cases that
    have usb ports on the front panel, and a extra wire was connected that needs to be cut. One person
    left a message in the same situation I'm in. Our case don't have USB ports and we're just using the
    D-Panel. We get the same problems everyone else has. That person who left the message didn't
    get a reply. I did read one message where WinXP SP2 maybe the problem, before I reinstall winXP SP 1
    I would like to see if I have other options to help correct the problem. When I plug my Scanner in to a usb
    port on the rear, I get "unknown device". I connected 2 D-Panels in to jusb1 and jusb2 then try these
    ports, the two ports on jusb1 don't even see the scanner, the ports on jusb2 i get the "unknown device".
    I cleared the cmos and reset the bios, that didn't help, hell I ever upgraded the bios. Does anyone have
    any other ideas on this problem? I would like to go to bed at reasonable hour.
    Thanks everone



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    Glenn

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    Re: USB Problem
    « Reply #35 on: 04-May-05, 13:53:18 »
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  • I had gotten a reply from you in another message area and couldn't find a way to start a new thread.


    "New Topic" is at the top right of each forum. 8-))
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  • Is it just the scanner? Other USB devices, do they work?

    Sometimes, but this probably not the case here, you have to install the scanner driver first, reboot, and then attach the scanner.

    USB devices doesn't need mush more than a correct connection to the pins.
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    mystvearn

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  • Just cut the wire and evreything is settled. Nothing more. Only 2.0 does not work. All 2.0. Thanks.
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    GC61

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    Is it just the scanner? Other USB devices, do they work?

    Sometimes, but this probably not the case here, you have to install the scanner driver first, reboot, and then attach the scanner.

    USB devices doesn't need mush more than a correct connection to the pins.

    I don't think you were reply to mine, but I have been having the same usb problems. So happens I got in to this trying
    to get my scanner going. I'm only using jusb1 for the d'panel. The usb ports say "unknowm device". I have cleared the
    cmos. I removed all usb drivers and had the system renstall them. What I have now is the on-board usb disabled, and
    installed a pci usb card and this found my scanner right off. With the pci card installed I turned the on-board usb and
    the pci card still sees the scanner and the on-board usb still don't see the devices. If you or someone else can figure
    something out, I'll love you for ever


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  • You say you have a scanner. I do think I was answering your post. :undecided:

    Nice you got things going. I don't think you would have needed the PCI-card to fix your problem. Letting Windows have its way, with its own drivers, should have sufficed. Which you did! :biggthumbsup:
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    Rowens

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    My front USB  ports and internal Addonics card reader on a K8N Neo Platinum have never worked but I haven't had the time to troubleshoot the problem. I saw this thread Friday and pulled the USBOC wire on Saturday. Everything is now working. Cool!
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  • Glad it's working for you now.
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    duvallite

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  • This is a good thread, but the USBOC fix did not work for me.  I recently discovered that the front USB ports on my Antec Plus660AMG case would not work with USB2.0, even though the USB headers on my 865PE board worked fine.  Even after making sure that nothing was connected to pin 10 (USBOC), it still would not work, I just kept getting the "unrecognized device" message whenever I tried to plug in my jump drives :confused2:.  After searching several forums, it turns out that the PCB that Antec uses in my case for the USB front ports could only handle USB1.1, and not the 2.0 version.  I made a quick call to Antec customer support to verify this, which they did, and they sent me a new PCB at no charge that they said would work with 2.0 devices.  Three days later I got it in the mail, hooked it up. and it works fine now  :smile:.  Both PCBs were visually identical, but obviously different in some way.  So, if the USBOC fix doesn't work for you, and you have an Antec case, this may be another option for you to try. 
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  • Good for you. I've found Antec's customer support to be very good. They were very responsive to me.
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    folken

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    ok i have a k7n2 delta mobo.  i have the usb problem in both front and back of my pc. i get the error with my hp scanjet 3970 scanner.  i read in the hp website that nfoce chipsets arnt compatible with with the 3000 modle series scanners.  ok i notice the pic about taking out the usboc wire. the pin definition chart is the same as my manuel but the plug is not the same as mine in my mobo.  where u take the plug part out of pin 10 it says in the side of it GND instead of usboc. anyway i took it off pin 10 so nothing is there and i still get the problem. can soemone please point me in the right direction.
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  • what error do you get? the scanjet 3970 will still work with USB 1.1, i know cos i tested one at work on my PII test rig, which only has USB 1.1
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    folken

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    the error i get is when i plug in the usb is Unknown Device and the in a box it says this device (usb) has malfucntioned or no longer works or something like that.
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  • ok, so have you tried the scanner in another machine? do any other USB devices work ok in the same port?
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    folken

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    the scanner works ..it stop wroking when i got this new mobo. it work before with an Asus mobo.  yes other devices work in the same port and i have tried it in all the ports.
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  • It sounds odd it would work on an Asus but not on MSI. Are there any other differences? Like, even more USB devices, USB hubs, etc? There is a 500mA limit for USB devices. You can sum your USB devices up somewhere in XP I believe.
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