Keeps 'losing' USB 2 devices

external USB2 Hds keep umounting themselves ( is that the right expression?)
when working in Lightroom library when suddenly 'file not found' means thatthe external HD I was working with has dropped off my desktop. It is connected via an USB (2) hub - I thought these iMacs were supposed to be backwards compatible - worked witout glitch on my G5 desktop
(before you suggest I have no spare USB ports to connect directly as wacom misbehaves too if not connected directly, plus keyboard plus USB2 hub for many other devices (speakers,printers,etc)

turns out this is the USB HUB - doesnt happen wothout it

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Im trying to sync my iphone 3 to my computer but it keeps saying usb device not recognised

im trying to sync my iphone 3g to my computer but it keeps saying usb device not recognised.

Hi abbyntaff,
Welcome to Apple Support Communities!
Take a look at one of the articles below, the first iss for windows computers and the second is for Macs. They provide troubleshooting tips that should help resolve issues that would cause an iPhone to not be recognized by a computer.
iOS: Device not recognized in iTunes for Windows
http://support.apple.com/kb/ts1538
iOS: Device not recognized in iTunes for Mac OS X
http://support.apple.com/kb/ts1591
-Jason

My pc keeps saying usb device not recenized iv tryed so i cant restore my ipod touch 3g it works with iphone4 iv tryed diffrent wires and still the same

my pc keeps saying usb device not recenized iv tryed so i cant restore my ipod touch 3g it works with iphone4 iv tryed diffrent wires and still the same plz help

Hello again Graham,sorry I spelt your name wrong on my last post ... Ok I went to the device manager and found a yellow mark. I went to it and selected re install driver. I then re booted my pc. I now have no yellow marks in the list but my pc still wont recognise my iphone.
Could I try anything else ?
Cheers Chris

Image Capture application keeps "losing" my device

Image Capture was telling me that there wasn't a scanner or camera connected. I use an HP Photosmart C4680. The printer aspect has been fine since upgrading to SL. I inserted my SL disk. Opened Optional Installs. Went through the prompts etc. and selected to install the Printer Support. Ejected the disk. Restarted computer. Opened Image Capture and device was listed on left side margin and test worked perfectly.
The problem now is that every 12-24 hours the device disappears again from Image Capture.
Anyone else have this problem or have any ideas how to permanently correct it?

Similar problem with Lexmark X4550.
Printing fine whether or not Image capture recognises the scanner.
Open image capture no scanner listed (ipod and phone are listed).
Unplug USB and pug in - scanner appears and works (there is a bug where the rotation correction is not supported and the scan fails)
Quit image capture and re-launch image Image capture scanner is "lost" (ipod and phone appear as before). Unplug and plug in USB cable and scanner re-appears.
Anyone have any suggestions as how I can make Image capture "remember" I have a scanner attached.
I'm using the bundled Lexmark driver with SL.
Cheers
Ben

USB Device Not Recognized - is my iPod toast?

Got a new computer recently with Win XP. When I try to connect my iPod with a USB adapter I keep getting "USB Device not Recognized" and if I click that I get "Try reconnecting the device. If Windows still does not recognize it, replace the device."
I can connect other USB devices like my compact flash cards etc. The iPod was working on my old computer.
Any ideas??
Thanks in advance for any help!!!

I had a new ipod and windows wasnt recognizing it or giving me the message "new hardware found" and then telling me the drivers were missing... this is what I did and it fixed my problem.
1. go to www.driverguide.com and sign up (for free)
2. download usbstor.sys & usbstor.inf (and take note of where you download them to)
3. update drivers by selecting folder you downloaded the two files to
4. restart computer
5. open itunes and then connect ipod
good luck
-jackie

K8N Neo Platinum, USB devices keep losing power

I have a K8N Neo Platinum with a 3000+ AMD 64 chip...
I have a USB problem whereby my wireless USB adaptor just keeps losing power, when I look at the adaptor itself all the power has gone and no lights are on. Unplugging the device and re-inserting it does not get any response from windows. Also, after this has happened, my other USB devices (ie mouse) continue to work fine UNLESS I unplug them and re-insert them. If I do this they also will not power back up. I've tried various adaptors from Netgear and alll of them have the same problems, its like they are causing the USB on my system to fail.
This happens with both the motherboard rear ports and the case front ports and is really driving me mad. Running XP Pro SP 2
I have this problem a couple years ago, and now I've gone back to using the same machine after a reformat the same is happening again. I've installed the latest nFoce drivers and in device management I've turned OFF power management for the USB Root Hubs but it's still happening.
Any ideas?

Check to see if there is a wire running from your Front USB ports to the #10 slot of your USB block which connects to the motherboard header.
USB connector block layout which corresponds to the pin layout on boards with the Intel spec for USB. Do not cut the pin on the MOBO. You are removing/cutting the wire to the connector block from the case.
2 4 6 8 10(this wire, #10, not needed)
1 3 5 7 9(filled/key)
If you find a wire leading to the #10 spot on the block, remove that wire. My block has tabs so that you can pull the wire out, or you could snip/cut the wire leading to that position--if you cut the wire, be careful to cut the correct one and cut it in such a way that it may be repaired if you make a mistake. Make sure you wrap the wire, the exposed end/s, you remove/cut with electrical tape so as not to accidentally cause a short. I actually folded the wire back and wrapped it.
2 posts to read--Here and Here.
This seems to be a common issue involving many different case manufacturers. I don't know how it applies to other MOBO manufacturers, but in these forums it is not limited to a specific MSI model or supported chipset(Intel or AMD).

USB devices keep losing power - Neo Platinum

I have a K8N Neo Platinum with a 3000+ AMD 64 chip...
I have a USB problem whereby my wireless USB adaptor cuts my connection, when I look at the adaptor itself all the power has gone and no lights are on. Unplugging the device and re-inserting it does not get any response from windows. Also, after this has happened, my other USB devices (ie mouse) continue to work fine UNLESS I unplug them and re-insert them. If I do this they also will not power back up. I've tried various adaptors from Netgear and alll of them have the same problems, its like they are causing the USB on my system to fail.
This happens with both the motherboard rear ports and the case front ports and is really driving me mad.
XP Home SP 1
USB mouse + opther USB devices
Netgear WG121 & WG111T wireless adaptors.
any ideas? I'm planning to reformat and rebuild otherwise

I don't know what you mean by USB wireless adapter, but if you mean a USB wireless Hub, it could be the following: If you are plugging the Hub into a USB port on your case, the case USB wiring maybe different from your motherboard, and is grounding out your hub.
This happened to me, I have a K8 Neo Plat board in an Antec case, the USB pin configs are different; and my case ports won't work. They gound out all my USB ports if I leave them plugged into the board. I moved my self powered USB hub to a back USB port and disconnected the front USB ports from the motherboard and now it works fine.
Another reason for the problem could be that you have so many USB devices plugged into your board that you are overworking your power supply. This happened to me too. I have six ports available on the board and I'm using them all. This caused my PSU to overheat. I had to go to more power.
I don't think it's a Windows problem, unless Windows is losing track of the devices. If they show up in your Hardware Profile but still don't work, I don't think Windows is the problem and reinstalling it won't help.
But, if you have installed SP2 over XP SP1, that could be the problem. You may need to do a clean install of SP2 and then reinstall the drivers for all your USB devices. I would get the latest drivers for everything from each mftrs web site.

I have a 3rd generation ipod that will not connect. I keep getting an error message that says "USB Device Not Recognized". I have tried 3 seperate cables and none of them are working. Please help!

It keeps telling me that one of the USB devices for this computer has malfunctioned and windows does not recognize it. I have tried all of the ports and still am not having any luck. I have purchased 3 brand new cables and none of them are working. I have tried to update the driver but it says I am using the most up to date. I have tried to reset the Ipod by holding the center button and menu button until the apple appears. I am not sure what else to try. Any help would be greatly appreciated. My computer is Windows Vista!

Hello butterflygirlie,
Have you tried uninstalling the driver for your iPod from within Device Manager? After uninstalling it, go ahead and unplug your iPod and plug it back in. Doing so should cause your system to locate the proper driver for it.
B-rock

USB device keeps disconnecting/connecting after upgrading to Windows 8.1

I have a device(Pedal for Sim Racing) connected via USB, everything is working fine in Windows 7 and 8 but after upgrading my machine to Windows 8.1 the device keeps disconnecting and connecting for like every 2 seconds. But after I open the Property Sheet
in Game Controllers panel the disconnection issue was gone, if I reconnect the device the issue persist. Other people who have similar device also encounters the same issue after upgrading to windows 8.1. The issue persist with or without the device driver
installed.
Any idea, what might cause this?
Best regards
mark

I'v got this exact same problem with my Win 7 desktop. I've also got pedals and wheel but don't see it as different than all the other USB devices. I'm using a bunch of USB, but no hubs, including 3 external storage hard drives. But the momentary
disconnect appears in all devices as best as i can see..even my long time trouble free head phones..keyboard..and all. Sometimes the sound goes away and if I unplug and replug them the sound comes back, and other times I have to exit and re enter the
game. I also get video crashes ..maybe not related.IDK..and have to restart all, because I've got three black screens in Eyefinity. For years my system was trouble free and its just slowly started getting worse. I've thought it had to do with system "sleep"
etc but long ago went to never sleep max performance etc..Makes no difference. Keep thinking its my hardware or my house wiring etc..But can't seem to solve it. I replaced my Mobo/chip/ram maybe 6 months ago and that appears to have not helped. It seems
to be getting worse. I hate to start replacing parts piece by piece..cost a lot of money and sometimes doesn't help.
When I'm playing a game I can often hear "faint" sound of USB connect disconnect happening with regularity..that little bing/boink sound etc..So it must just be constantly happening...Seems weird. Didn't have anything like this happening years
ago with pretty much the same hardware and same Win7 with the continuing updates etc.
What can be causing this common problem?

On my MacBook Pro with Retina Display, Why does the "USB Devices Disabled Unplug the device using too much power to re-enable USB devices" keep coming up after I unplugged the usb device?

On my MacBook Pro with Retina Display 15", that I purchased a few weeks ago, started coming up with the following message on my desktop:
"USB Devices Disabled Unplug the device using too much power to re-enable USB devices".
I unplugged the device and the message still keeps coming up.
This is what I have done so far to troubleshoot:
I shut down the laptop. When booting up I pressed the command+option+p+r at the same time. It comes up with a menu to reinstall OSX, Get help online, Run Disk Utility, etc. I choose the disk utility and repair the disk and then restarted.
The message keeps popping up and I can't seem to get rid of it. Why does the message keep popping up even though I don't have any devices hooked up to the laptop at all? Any help to reenable my usb ports and get rid of the messaage would be helpful.

I talked to Apple Support and we at least stopped the bleeding, a little bit. These are the troubleshooting steps I did before I contacted Apple Support:
1. Reinstalled OSX
2. Restore the last known good Time Machine Backup.
This did not fix my issue, so I called Apple Support and they told me this:
1. Turn Power off.
2. Wait 15 seconds.
3. Plug in Magsafe adapter.
4. Wait 15 seconds.
5. Hold down the Shift+Option+Power Button for 20-30 seconds.
6. Turn Power back on.
Ok, this stopped the bleeding a little, but as soon as I plugged in a Apple USB Superdrive
and a Apple Mini Displayport to VGA Adapter. This "USB Devices Disabled" pop-up pops up like every 30 minutes now. At least, it is not constantly popping up after I close it, so I guess it will do for the temporary. Going to contact Apple support, later, though to see what else can be done.

I keep getting this message : Because a USB device was drawing too much power from your computer, one or more of your USB devices have been disabled.

I keep getting this mesage : Because a USB device was drawing too much power from your computer, one or more of your USB devices have been disabled.
I need to charge my phone but it's not letting me!! Please help!

Solution may be found if you search in the "More Like This" section over in the right column and in the article - http://support.apple.com/kb/HT1151.

Ipod 7th generation. bought it 3 days ago. no problem then but now won't turn on. I keep getting a usb device not recognized (and i keep changing ports to no avail). what to do?

ipod 7th generation. bought it 3 days ago. no problem then but now won't turn on. I keep getting a usb device not recognized (and i keep changing ports to no avail). what to do?

wish i can rmber how mine was fixed i think i just waited tried again and likr magic it worked again left itunplugged, i was like you recently boughtand it happened to me, now i have another diffrent promblem with it.

The HP (USB connected) and Epson (wireless) printers keep losing their connection with my Mac mini. I have to physically disconnect the HP and then reconnect for the Mac to find it. Turning off the wireless Epson doesn't work. All software is updated.

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Hi Melissa,
Pretty strange, but...
Safe Boot, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, does it happen in Safe Mode? Reboot when it completes.
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Keeps 'losing' USB 2 devices

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