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ghjkl67

USB Device Not Recognized

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This is an issue that just started happening out of nowhere. All USB ports have power, but are functionally dead. I tried reinstalling the drivers and a system cleanup. After the system cleanup, my hard drive wouldn't boot. So, I plugged in my spare that I am using now. Still no USB ports! There are 2 in the motherboard and 2 external. I tried disconnecting the external ones, but that didn't work either. I tried reinstalling the drivers several times with no success. They did start briefly working the other day on the spare hard drive after ejecting the CD-ROM, but it didn't work for long. My keyboard and mouse are not on USB's which explains why the PC is still functional. Any ideas?

Edited by ghjkl67

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No errors in the Device Manager? I suspect because it's doing it from two different hard drives that it's a hardware issue and not a driver or software issue. We always have people try booting to a Linux Boot disk, such as Ubuntu to rule out Operating System problems. If you are able to create a Linux Boot disk, try that and see if the problem persists.

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I'll try making the boot disk, but it may be beyond my capabilities. For now, let's assume a hardware issue. There are no errors in device manager. Remember that the USB worked for a little while after simply ejecting the CD-ROM. That sounds like a hardware issue to me.

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Yeah it does sound like a hardware issue--especially since the second hard drive has the same problem. If you can confirm with the Linux disk, your only option may be to purchase a USB PCI expansion card--maybe something similar to this http://amzn.to/2iznZXs

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The PC already has something similar to an USB expansion card on the front, only it plugs in to a pin style connector on the motherboard, not a PCI slot. They are behaving exactly the same way as the motherboard USB ports. Do you think using a PCI expansion card would work any differently?

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Those front facing USB ports run on the same USB chipset so they should work the same way as the on-board ones.  A PCI card will run independently of that so it should work fine, assuming the issue doesn't lie somewhere else.  I am leaning towards a failing PSU that isn't pushing out enough wattage to cover everything vital and the USB as well.

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That's good to know. I have a spare PSU. Maybe I could give that a try. If it still doesn't work, I'll try a USB card. Thanks.

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Well, I tried the spare power supply. No change in USB status. Looks like I'll be trying a new USB card tomorrow.

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I hung this project up for a few weeks, but I'd like to start up again. A while back, I bought a USB expansion card, but it would not fit in my motherboard because it required an express PCI slot. I don't suppose something like this would work:

http://www.ebay.com/itm/5-Port-High-Speed-USB-2-0-PCI-Controller-Card-w-NEC-Chip-4-1-/131931957505?hash=item1eb7c1e901:g:JTkAAOSwtfhYojsd

 

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If you could either tell me the make and model of your computer or your motherboard I can tell you 100% what will work.

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Motherboard is a SOYO K7V Dragon Plus. No computer brand name. It was custom built.

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That one looks like it will fit. I'll give it a try. Thanks.

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Got the USB card and it works excellent. Thanks again.

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