USB device not recognized Problems

February 23, 2010 at 00:48:10
Specs: Windows XP, 684MB
Ok here is the problem. It says in device manager the USB Ports are working properly but infact they arnt because everytime i plug in a USB Object the computer will not reconize it so i cant put anything on this computer, How can i fix this problem?

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#1
February 23, 2010 at 02:01:16
... you could try devcon download and place the file in C: drive

... then click "start" run (type) cmd [press enter]

... next in command prompt (type) cd\ [press enter]

... then (type) devcon rescan [press enter]

... to see if it detects and reactivates your usb ports


.

... Posting is provided "AS IS" with no warranties
http://img714.imageshack.us/img714/...
Grrrr... ...im


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#2
February 23, 2010 at 06:23:53
USB devices may not work correctly when they're connected to certain USB ports e.g. ports in a hub or on the front of a desktop case. If you have a desktop computer, you may have an IRQ sharing problem you need to fix, or your power supply may be starting to fail.
See response 3 in this:
http://www.computing.net/answers/wi...

Also - if you are using a USB extension cable, some of them have inadequate wiring and will not work properly with some USB devices.


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#3
February 23, 2010 at 12:42:46
Not sure what the problem is but i tried that devcon thing and it didnt work and i dont think that ccleaner didnt do anything either....so what should i do now?

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Related Solutions

#4
February 23, 2010 at 13:11:43
"...everytime i plug in a USB Object the computer will not reconize it..."

... are you saying that when you plug an usb device into the port Windows does not indicate that anything has been plugged in? by pop-up or windows sound!

... it might be worth entering your bios to see if anything "usb" has been disabled..... if so alter to enabled and save on exit.

.

... Posting is provided "AS IS" with no warranties
http://img714.imageshack.us/img714/...
Grrrr... ...im


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#5
February 23, 2010 at 18:42:59
Did you read and understand the info at the link in Response 2 ??

E.g. If you you have looked in System Information and you don't have an IRQ sharing problem, try plugging the USB device directly into a USB port on the back of the case. That should work fine.

"Product: Biostar M7vig400"

That's an older mboard model.
http://www.biostar-usa.com/mbdetail...

Processor: AMD Athlon, Athlon XP, Duron, and Sempron processors
200 / 266 / 333MHz front side bus

• Chipset:
VIA KM266 Pro / VT8235

Sometimes older mboards have had electrolytic capacitors installed on them that were not properly made, and the mboard manufacturer did not know about that at the time; as time goes by, those capacitors are likely to leak, and fail, and, sometimes, explode.

Open up your case and examine the mboard to see if you have bad capacitors, and/or other findable signs of mboard damage .

This was the original bad capacitor problem - has some example pictures.
History of why the exploding capacitors and which mboard makers were affected:
http://members.datafast.net.au/~dft...

What to look for, mboard symptoms, example pictures:
http://www.badcaps.net/pages.php?vid=5
Home page that site
- what the problem is caused by
- he says there are STILL bad capacitors on more recent mboards.
http://www.badcaps.net/

Pictures of blown capacitors, other components, power supplies, Athlon cpu's, etc.:
http://www.halfdone.com/Personal/Jo...


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#6
February 23, 2010 at 21:26:52
Have no idea about any blown thing on the mboard, everything looks fine and very new on it. No dust or any wear and tear. Just marks from the screws. And the bios setup it strange compared to a name brand mboard lol. But the only thing i see disabled in BIOS Features is Summary Screen Show and Virus Warning. And yes when i plug up a USB Object there is no notafacation that it has been plugged in at all. And when i try to restart the computer. It will not boot up. It will power on but nothing happens. Until i turn it off and unplug the USB object....?

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#7
February 24, 2010 at 07:18:25
What "USB Object(s)" are you plugging in ?

Do all of them not work, or only some of them?

If some of them work, e.g a USB mouse or keyboard works, but not a printer, you probably have an IRQ sharing problem.

Did you read and understand the info at the link in Response 2 ??

E.g.

Did you look in System Information to see if you have an IRQ sharing problem ???

Did you check your bios settings to make sure the current reading of +5v, +3.3v, and +12v is within 10% of their nominal values?

You could try re-loading the USB stack as I described at the end of that info, but it may not help if you DO have an IRQ sharing problem.
........

The USB controller(s) is(are) enabled in the bios Setup by default.

"It says in device manager the USB Ports are working properly..."
probably indicates it is / they are enabled.

If you're not sure, load bios defaults in Setup, save setiings
........

Look in the mboard manual and make sure the wiring to the front USB ports are correctly hooked up on the USB headers(s) on the mboard.
If you don't have the manual, download it from here:
http://www.biostar-usa.com/mbdownlo...
........

If none of the above helps....

If you're sure you don't have any visible evidence of failing capacitors or other mboard damage.......

We've heard of a few cases in Topics here where the built in USB controllers have been damaged, but it seems that's quite rare.
It's usually caused by a power surge or spike, or a power failure event, or a lightning strike on the power grid somewhere near where the computer is, or could be caused by something on the mboard being shorted by something the user did.

In that case, you could try buying and installing a PCI USB 2.0 controller card (or two) in a PCI slot(s) - they're relatively cheap - they can have from 2 to 6 USB ports, up to 4 externally, up to 2 internally.
However, don't install it in the last PCI slot closest to the center of the mboard - that slot is forced to share it's IRQ with the video, and only PCI video cards are likely to not have problems when installed in that slot.
However, I don't know whether the ACPI features of the bios will work when you plug in USB devices into only the card - e.g. moving a mouse may not "wake up" the computer.


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#8
February 24, 2010 at 11:32:35
Nothing works. Not a thing lol, ill plug in usb wireless internet and that dont work, USB keyboard no worky, USB Multi card reader it dont work lol, nothing works at all....sucks....

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#9
February 24, 2010 at 13:43:02
Did you try the USB ports on the BACK of the case?

Did you check the wiring of the front USB ports in the mboard manual ?


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#10
February 25, 2010 at 07:17:26
If you or anyone has been fiddling with the wiring connections on the mboard USB header for the front USB ports on the case, you or they may have connected the wiring to the header the wrong way. In that case, the front ports on the case cannot work, AND, if you plug something into a front port AND a rear port, the rear ports may not work either if the front port is mis-wired - don't plug anything into a front port when you plug a USB device into one of the two ports on the back of the case that are built into the mboard, the ones where most of, if not all of, the ports for the mboard on the back of the case are
- if a USB device DOES NOT work in a rear port in that situation, then your USB controller circuits are definately fried.
- if a USB device DOES work in a rear port in that situation, you need to correct the wiring connections to the USB header on the mboard for the front case ports.

Your mboard model has two built in USB ports - the ones on the back of the case that are built into the mboard, the ones where most of, if not all of, the ports for the mboard on the back of the case are
- and 4 more USB port connections are available by connecting wiring to 2 headers on the mboard that are for two USB ports each. 1 or 2 of those USB ports on a header are probably connected to 1 or 2 front USB ports on the case, assuming they'e been connected. There may be a plate in a card slot space on the back of the case that has two (or 4) more USB ports in it - that would be connected by wiring to one of the two (or both) USB 2 port headers - that can be wired up wrongly as well.

The wiring for front USB ports on cases, or a plate wiring adapter that installs in card slot space, and the USB headers on mboards was never standardized. Mboard manufacturers tend to use the same uses for the pins on their USB headers over time for all models, although there are exceptions to that, but different mboard manufacturers can have different patterns of what the pins connect to.
If a a plate wiring adapter that installs in card slot space came with the mboard, it will work with the USB header on the mboard for sure, but otherwise it may not.
If the wiring for front ports on a case, or a plate wiring adapter that installs in a card slot
- has a one piece two port female wiring connector, it has to be compatible with what the pins are for on the mboard USB header
- has two four in a row or two 5 in a row, or one of each, female wiring connectors, they have to be compatible with what the pins are for on the mboard USB header - sometimes they need to be installed in the same direction; sometimes they are installed in opposite directions.
- if the female connectors for the USB port wiring are individual for each wire, the wiring will work with any USB header.
- if the female connectors for the USB port +5v and ground wires are individual for each wire, and the data wires are in a two hole female connector, the wiring will work with most USB headers.
- if the wiring of a USB port has 5 wires, or if there are 5 pins for a USB port on a header, the use of the 5th wire or pin can be for either an additional ground, or overcurrent. You only need 4 wires to be connected for a USB port to work. Sometimes you need to NOT connect the 5th wire or 5th pin, when the mboard header and the USB port intended uses are different. E.g. install a 5 in a row female connector on the 4 pin side of a 9 pin header, the 4 in a row female connector on the 5 pin side of the header, so the 5th connection is not made on both sides of the header. If the use of the 5th wire or 5th pin is an additional ground, either ground wire connectio will make the USB port work if you connect only 4 wires.


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