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USB port stopped working

June 17, 2009 at 06:01:19
Specs: Windows XP

My two usb ports have stopped working although my printer still connects and works.
The other devices say they are connected but nothing comes up on My Computer so I can enter them.
What should I do?
Thanks.

See More: USB port stopped working

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#1
June 17, 2009 at 07:23:45

Shut down the pc, remove the power from it and wait 10 minuttes. See if it changes anything.

--------------------

Thor Byrgesen: The one,
oh the one computers and all electronics just hate.


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#2
June 17, 2009 at 10:17:54

They haven't been working for a few weeks but i've been too busy with work to fix them etc. So the computer has been on and off many times.

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#3
June 17, 2009 at 10:34:43

Look in device manager for devices with a yellow exclamation mark. Are there any?. Probably the easiest thing is do a system restore. Start+accessories+system tools+system restore. Try going back a couple weeks. G/l

WinXp Amd 64 3000 Msi Neo2 Platinuim 1 gig ddr 400. When we cast a pebble into a pond we should look past the first ripple.


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Related Solutions

#4
June 17, 2009 at 13:53:05

I attempted to do the system recovery but my computer did not shut down when I pressed next - I waited for around 50 minutes for it to do something.

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#5
June 17, 2009 at 14:22:52

>>Shut down the pc, remove the power from it and wait 10 minuttes. See if it changes anything.

what would you expect this to do? What should the OP be looking for?

http://support.microsoft.com/default.aspx?scid=kb;en-us;555375
How to ask a question.


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#6
June 17, 2009 at 14:50:02

Assuming all the subject USB ports are connected to the mboard one way or another (and none are on a card in a slot) ....
If one USB port works fine there's probably nothing wrong with your USB controller(s) or the driver software loaded in Windows for it/them.
Although, if some don't work at all for any device, you could check your bios Setup settings and make sure all USB controllers are enabled - sometimes there is more than one listed.

You may need to connect the devices that aren't being recognized properly to a different USB port, and/or if you are using the devices that aren't being recognized properly in ports in a hub that connects to only one directly connected to the mboard USB port they may not work, or if this is a desktop computer, you may have a power supply problem, or you may need to fix an IRQ sharing problem and reload your USB stack.

See response 3 in this:
http://www.computing.net/answers/wi...

If you ARE using a USB controller card in a slot....

- on a desktop computer all devices should work in all the USB ports in the card, unless.....
- the PCI card has a poor connection it it's slot - make sure it's down all the way in it's slot,
- or you may need to move it to a different slot. Don't use the last PCI slot on the end closest to the middle of the mboard for anything except a PCI video card - that slot is forced to use the same IRQ as the onboard video or the card in a video slot and that often causes problems with cards other than PCI video cards.
- or you may have an IRQ sharing problem you need to fix and you need to move the USB controller card or another card to another slot (see the above link).

- if your computer is a laptop, if you are using a PCMCIA (PC Card) USB controller card in a slot, or a SmartCard USB controller card in a SmartCard slot, usually it will only support 500ma current max total for all the USB ports, rather than the standard max 500ma from each - if you plug in two or more devices into it's ports, one or both or all devices may not work properly, if you plug in something that requires more current - e.g. external harddrives require 500ma - Printers, scanners, and multifunction devices (printer, scanner, etc. in one) require more current than most devices but not as much as external hard drives.
Some laptop USB cards have a jack you can plug in an external +5v DC power adapter (the card usually doesn't come with the adapter) into that will allow you to draw 500ma from each port, but that may not help for some devices.
.......

Some laptops can't actually supply the stadard max 500ma from each of their built in USB ports - in that case you have to connect an external drive to two USB ports via two cables or a Y cable from the external drive, or use an additional external power adapter (probably +5v DC) for the external case if it's a 2.5" drive and it has a jack for connecting one .


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#7
June 17, 2009 at 21:48:34

Is this a laptop or desktop? The printer should work because it has a separate power supply. Sounds like the usb ports lost their power. You could pick up a cheap POWERED usb hub and try your other usb devices on that. You should find 1 at bestbuy or where ever for $15-$20. How many ports are on the system?

WinXp Amd 64 3000 Msi Neo2 Platinuim 1 gig ddr 400. When we cast a pebble into a pond we should look past the first ripple.


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#8
June 18, 2009 at 11:40:42

It's a laptop, and neither of the two ports I have are working.
Should I get them replaced at a shop?

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#9
June 18, 2009 at 12:16:45

That could be costly. I would try a powered hub first. If the hub works then the power to your ports is dead. If it doesn't then its software. You could try cleaning the ports. With the comp turned off you can use a mild contact cleaner or even windex on a small cloth and something like a hairpin. Dampen the cloth with the cleaner then use the hairpin to slip the cloth into the usb port and move it around gently. Allow a few minutes to dry then try the ports again.

WinXp Amd 64 3000 Msi Neo2 Platinuim 1 gig ddr 400. When we cast a pebble into a pond we should look past the first ripple.


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#10
June 18, 2009 at 12:28:10

Btw. Taking it to a shop could cost a couple hundred $ that's why I'd try the hub first.

WinXp Amd 64 3000 Msi Neo2 Platinuim 1 gig ddr 400. When we cast a pebble into a pond we should look past the first ripple.


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#11
June 18, 2009 at 12:33:39

Have you tried disconnecting the printer then trying your other devices?

WinXp Amd 64 3000 Msi Neo2 Platinuim 1 gig ddr 400. When we cast a pebble into a pond we should look past the first ripple.


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#12
June 18, 2009 at 12:35:25

What other devices are you connecting?

WinXp Amd 64 3000 Msi Neo2 Platinuim 1 gig ddr 400. When we cast a pebble into a pond we should look past the first ripple.


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#13
June 18, 2009 at 14:40:41

"It's a laptop, and neither of the two ports I have are working.
Should I get them replaced at a shop?"

You said in your first post your printer works - I assumed you meant it works connected to a USB port connected to the laptop .

If the printer IS connected by USB to the laptop see response 6!

If that's not your case why did you even mention that?

If nothing works in any USB port directly connected to it's mboard, check your bios Setup and make sure your USB controller(s) is (are) enabled there. If it is/they are, a USB mouse or USB keyboard should work even before Windows fully loads (support for both is built in the bios) , although a USB mouse may not be detected in Windows itself until after the desktop loads if one was not used previously .
However,
- a mouse or keyboard with a PS/2 connector on it's cord will NOT work with a simple (no circuits other than the direct wiring) PS/2 to USB adapter in a USB port (or a mouse or keyboard with a USB connector on it's cord will NOT work connected to a simple USB to PS/2 adapter in a PS/2 port) unless the mouse is a "combo" one - meant to be used with and having the circuits for both PS/2 and USB use.
- in order for you to be able to get into the bios Setup with a USB keyboard, Legacy USB or USB Keyboard or similar must be enabled in the bios Setup. In newer bioses that's usually enabled by default; in older bioses that's usually disabled by default.

If your USB contoller(s) is/are enabled in Setup, and still no mouse or keyboard works in any USB port directly connected to it's mboard, your problem is not caused by faulty software, it's caused by hardware failure - probably by the USB controller(s) being damaged - it/they is/are built into the mboard - you can't replace it/them unless you replace the mboard. It could be caused by a failure of the circuits inside the laptop that supply +5v, but in that case your CD or DVD drive can't work properly either - is it working?. In that case the cheapest way to go is you could try disabling the USB controller(s) in your bios Setup, and buying and installing a PCMCIA (PC Card) USB 2.0 controller card (relatively cheap ) if your laptop has a slot for that, or buying and installing a SmartCard USB 2.0 controller card (more expensive) if your laptop has a SmartCard slot , and plugging your USB devices into that, but see my eariler Response 6 about the current limits those may have.

If that doesn't help the only solution is, probably, the mboard must be replaced (or much less likely, some power module inside the laptop must be replaced) - that can be very expensive unless this model is old enough that you can get a used mboard (or module) cheap and replace it yourself - you may want to get yourself another laptop instead


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#14
June 19, 2009 at 03:29:45

The other devices I am trying to connect includes: two cameras, mp3 player and two USB sticks.

I will attempt to clean the ports and see if that helps.


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#15
June 19, 2009 at 07:03:03

Is your printer connected via USB or not??

You could examine the ports and plugs to see if this applies but it's not likely it applies to more than one at any one time:
- there is rectangular plastic blocking plug in each port and standard sized plugs (A type) that prevents the USB plug from being plugged in upside down - make sure that's there and is not loose.
- make sure the shell (rectangular outer metal) of the port is not bent out of shape - a plug should not be loose when inserted into the port


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#16
June 19, 2009 at 09:57:10

Yes via USB.
There doesn't seem to be anything loose hanging and the port is in shape.

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#17
June 19, 2009 at 10:20:20

"Yes via USB."

See response 6 then. It's likely there's nothing wrong with the USB controllers.

You could try re-loading the USB stack as specified in the first link I referenced in that, but usually that's not necessary for a laptop.


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#18
June 20, 2009 at 14:38:55

I highly recommend reloading the USB stack as Tubes said. This has fixed similar problems for people here.

WinSimple Software
CompTIA A+ Certified


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#19
June 21, 2009 at 10:07:46

i have the same problem but with an SD or memory card slot
i checked the device manager and it did show up but had an yellow exclamation mark and i dont know how to fix it ? im sure i could help once i fix mine - please help

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#20
June 21, 2009 at 11:22:23

giselle

That can be an entirely different situation.
What operating system are you using?
What brand and model of brand name system or mboard do you have?
Desktop or laptop?
Did the system come with the reader?
If it's a brand name system, or in any case, have you loaded the operating system from a regular Windows CD?
Did the reader have a card in it when you were looking at Device Manager? - it's quite common for a card to become damaged - try unplugging the card if that applies.

If you're using 98SE or 98, there are no built in drivers for flash card readers in the operating system. You have to either install drivers for it that came on a CD with the card reader, or if it's a brand name system and came with the card reader, there are probably drivers for it in the software downloads for the model for the reader, or there are generic drivers you can try that work for most card readers - if it's a laptop you may have to install laptop main chipset drivers as well.


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#21
July 18, 2009 at 06:18:11

Hi agian, sry for the long time for no response.

"Shut down the pc, remove the power from it and wait 10 minuttes. See if it changes anything."

What I ment with this was, that sometimes your hardware gets overheated. If you use hardware that require more then the 500ma, as Tubesandwires talks about, then some conductors might gather too much power.

Since it's a laptop, you might consider taking the battery out for some time and see if this helps.. This will uncharge any conducters.

giselle.bpg this might help you as well. Remove laptop battery or turn off the power at the switch at the wall.


If this doesn't help to you, then the hardware is damaged or loose, since it worked ONCE.

--------------------

Thor Byrgesen: The one,
oh the one computers and all electronics just hate.


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